0
x + 3y = 4
-x + 2y = -4
Simultan eous eq'ns.
Eliminate 'x' by adding. 4
Hence
5y = 0
y = 0
When y = 0
Substitute
x + 3(0) = 4
x + 0 = 4
x = 4
So the answer as a coordinate pairs is ( x,y) = ( 4,0)
What else can I help you with?
10y equals 2y plus 4 plus 7y?
10y = 9y + 4, so y = 4
-5x plus 2y equals 6 -9x plus 2y equals 22?
Subtract first from second gives -4x = 16 so x = -4 and y = -7
Enter the answer as an ordered pair 2y plus 2x equals 20 y - 2x equals 4?
2y + 2x = 20 y - 2x = 4 Add the two equations: 3y = 24 so that y = 8 Substitute this value of y in the second equation: 8 - 2x = 4 then 4 = 2x so that x = 2 Thus the ordered pair (y,x) = (8,2)
What is the slope of 4x plus 3y equals 6?
4x+3y = 6 3y = -4x+6 y = -4/3x+2 in slope intercept form
What is the x- value of x-2y plus z equals -9 3y-2z equals 4 2x plus y plus 5z equals -5?
x-(x-2y)+z=-9 3y-2z=4 2x+y+5z=-5 x-(x-2y)+z=-9 --distribute negative through bracket--> x-x+2y+z=-9 x-x+2y+z=-9 --combine like terms (x)--> 2y+z=-9 2y+z=-9 --isolate z--> z=-9-2y substitute z into second equation: 3y-2(-9-2y)=4 --multiply -2 through bracket--> 3y+18+4y=4 3y+18+4y=4 --subtract 18 from both sides--> 3y+4y=-14 3y+4y=-14 --combine like terms--> 7y=-14 7y=-14 --divide both sides by 7--> y=-2 Substitute value of y into simplified first equation: z=-9-2(-2) --multiply through the bracket--> z=-9+4 z=-9+4 --combine like terms--> z=-5 Substitute values of y and z into third equation: 2x+(-2)+5(-5)=-5 --multiply through brackets--> 2x-2-25=-5 2x-2-25=-5 --combine like terms--> 2x-27=-5 2x-27=-5 --add 27 to both sides--> 2x=22 2x=22 --divide both sides by 2--> x=11 x=11, y=-2, z=-5
What would you do to solve 2y plus 4 equals 3y?
2y + 4 = 3ySubtract 2y from both sides:4 = ywhew
Solve this equation80 equals 3y plus 2y plus 4 plus 1?
80 = 3y + 2y + 4 + 1 75 = 5y 15 = y y = 15
5y plus 4 - 2y equals 9?
5y + (4 - 2y) = 9 5y + 4 - 2y = 9 3y + 4 = 9 3y = 5 y = 5/3
2y plus 3y-7y plus 4 equals 16?
2y+3y-7y+4=16 -2y=12y=-6Check it-12-18+42+4=16-30+46=1616=16
What is the equation 80 equals 3y plus 2y plus 4 plus 1?
3y+2y+4+1=80 5y+5=80 5y=80-5 5y=75 y=15
If 3y equals 12 then 2y equals?
2y=8..... y=4
How do you solve 3x plus 2y equals 4 4x plus 3y equals 7?
You need to organise your question properly. 3x+2y=4 4x + 3y= 7? Is 4 4x = 44x or 4-4x or 4+4x How can there be 2 equal signs in 1 equation?
Solve 3y-9 equals -2y plus 4?
Add 2y - 4 to each side; 5y - 13 = 0 so y = 2.6
80 equals 3y plus 2y plus 4 plus 1 is?
Presumably you want to know the value of y. 3y+2y+4+1 = 80 5y+5 = 80 5y = 80-5 5y = 75 y = 15
Solve by the method of elimination 2x plus 3y equals 40 3x plus 2y equals 20?
y=16 x= -4
Is this a no solution 6x - 2y equals 4 -9 plus 3y equals 12?
(x, y) = (3, 7) is a solution.
80 equals 3y plus 2y plus 4 plus 1?
80 = 3y + 2y + 4 + 1 80 = 5y + 5 80 - 5 = 5y + 5 - 5 75 = 5y 75 / 5 = 5y / 5 15 = y
