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How can you get coefficients that are equal for y. 3x plus 5y equals 7 2x plus 15y equals 11?
Wiki User
∙ 13y ago
Multiply the first equation by 3 to give 9x + 15y = 21
Wiki User
∙ 13y ago
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What are the solutions to the simultaneous equations of 2x -3y equals 4 and 5x plus 2y equals 1?
Equations: 2x-3y = 4 and 5x+2y = 1 Multiply all terms in 1st equation by 5 and all terms in 2nd equation by 2:- So: 10x-15y = 20 and 10x+4y = 2 Subtract the 2nd equation from the 1st equation: -19y = 18 => y = -18/19 By substitution the solutions are: x = 11/19 and y = -18/19
3x plus 6y equals 18 2x plus 5y equals 20?
You need to be more clear about your question. 3x + 6y = 18 2x + 5y = 20 The two equations you give represent lines. I assume you're trying to find the point at which they intersect. There are various ways to work this out. One technique is to multiply each equation by a factor that gives one of the two variables the same coefficient. For example, if we multiply the first equation by 2, and the second equation by 3, we get: 6x + 12y = 36 6x + 15y = 60 Then we can subtract one from the other, which gives us a solution for y: [6x + 12y = 36] - [6x + 15y = 60] _______________ [0x - 3y = -24] So -3y = -24, telling us that at the point of intersection, y = 8. We can then plug that back into one of the original equations and solve for x: 2x + 5y = 20 2x + 5(8) = 20 2x = 20 - 40 2x = -20 x = -10 So the lines intersect at the point (-10, 8). Another way to work it out is to solve one of the equations for a single variable, and then plug it into the other one: 3x + 6y = 18 ∴ x + 2y = 6 ∴ x = 6 - 2y 2x + 5y = 20 ∴ 2(6 - 2y) + 5y = 20 ∴ 12 - 4y + 5y = 20 ∴ y = 20 - 12 ∴ y = 8 That gives us the value 8 for y, which we can once again plug in to either of the original equations to find x: 2x + 5y = 20 ∴ 2x + 40 = 20 ∴ 2x = -20 ∴ x = -10 Once again telling us that the lines intersect at the point (-10, 8)
15y plus 9 equals - 36?
-3
X over 5y plus 2x over 3y equals?
x/5y + 2x/3y = 3x/15y + 10x/15y = 13x/15y
How do you solve 15y plus 1 equals x for y?
i have no clue what the answer is
What does y stand for in 15y plus 14 equals 2 times 5y plus 6?
15y+14=2(5y+6) 15y+14=10y+12 15y+14-14=10y+12-14 15y=10y-2 15y-10y=10y-2-10y 5y=-2 y=-2/5
4x plus 15Y equals 6x equals 7y X weighs as much as how many ys?
.225
What is the greatest common factor of 15y plus 30x equals 10?
3y plus 6x = 2
How do you simplify 12x plus 4x plus 25y plus 15y?
Combine like terms, meaning add 12X plus 4X which is 16X and then you add 25Y plus 15Y which equals 40Y so the answer will be 16x+40y. combine like terms means add the ones with the same variable.
What is the value of 2x3 plus 15y if x equals -7 and y equals 2?
If x = -7, then x3 = -343 so that 2x3 = -686 y = 2 then 15 y = 30 So 2x3 + 15y = -686 + 30 = -656
What is 5y-3 equals 2y plus 12?
Y=55y-3=2y+123y-3=123y=15y=5
Is 10 plus 5y 15y?
No.
Find slope and y- intercept of line -5x plus 15y equals -15?
The slope is 1/3 and the y-intercept is -1.
How do you solve 3xy-4x plus 15y-20?
3xy-4x + 15y-20 Sol: As there are no number are same. So -4x-3xy +15y-20 -------------------- -4x-3xy+15y-20
