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This is a simultaneous equation question.
4(3x+4y = 90)
3(4x-3y = -5)
Multiply the top equation by 4 and the bottom equation by 3 then subtract the bottom equation from the top equation remembering that in maths a minus from a minus is equal to a plus.
12x+16y = 360
12x-9y = -15
And when subtracted:
0+25y = 375
Divide both sides of the equation by 25 to find the value of y:
y = 15
Substitute 15 for y into the original equation to find the value of x:
Solution: x = 10 and y = 15
What else can I help you with?
What is the answer to y equals 3x 3x plus 4y equals 30?
y = 3x 3x + 4y = 30 3x + 4(3x) = 30 3x + 12x = 30 15x = 30 x = 2 y = 3x y = 3(2) y = 6 (2, 6)
What does -x plus 4y-3x equals?
1
Simplify the algebraic expression 7x squared minus 4y plus 3x squared plus 5y plus 2 and evaluate it for x equals 3 and y equals 9?
7(3y-2)-(-4y+9)
What equation is equivalent to 3x-4y equals 8?
3x - 4y = 8Solve for x:3x = 4y + 8x = 4/3y + 8/3Solve for y:-4y = -3x + 8y = 3/4x - 2
What is equivalent to 3x-4y equals 8?
3x-4y = 8 -4y = -3x+8 y = 3/4x-2 or y = 0.75x-2 which is the equivalent in slope intercept form
3x plus 2y equals 4 -3x plus 4y equals -10?
(2, -1)
2x plus 3y equals 17and3x plus 4y equals 24then5x plus 7y equals?
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
How do you rewrite -3X plus 4Y equals 11?
4y = 3x+11 or as y = 3/4x+11/4
Solve the system of equations 3x plus 4y equals 12 2x plus 4y equals 8?
x = 4 and y = 0
3x plus 2y equals 7 and 2x plus 4y equals 18?
(-1, 5)
3x plus 2y equals 7 2x plus 4y equals 18?
(-1, 5)
3x plus 4y equals 7 2x plus y equals 3?
(1, 1)
What is the slope of the equation 3x plus 4y equals 8?
It is:- 3x+4y = 8 4y = -3x+8 y = -0.75x+2 So the slope is -0.75 and the y intercept is 2
Is the following a linear function 3x plus 4y plus 2 equals 0?
Yes.
What is the answer 3x equals 4y-x?
3x=4y-x 4x=4y x=y
What is the slope to 3x plus 4y equals 12?
3x + 4y = 12 Subtract 3x from each side 4y = 12 - 3x Divide by 4 on each side y = 3 - .75x The slope is what is multiplied by "x" or -.75
What is the answer to y equals 3x 3x plus 4y equals 30?
y = 3x 3x + 4y = 30 3x + 4(3x) = 30 3x + 12x = 30 15x = 30 x = 2 y = 3x y = 3(2) y = 6 (2, 6)
