8y + 7y = 15ySo [ 8y + 9 + 7y ] = 15y + 9If you want to get fancy and factor that expression, it's 3(5y + 3) .
First arrange this simultaneous equation in the form of: 4x+5y = 33 4x-2y = -2 Subtract the bottom equation from the top equation remembering that a - - is equal to a +: 7y = 35 Divide both sides by 7 to find the value of y: y = 5 Substitute the value of y into the original equations to find the value of x: So: x = 2 and y = 5
If you mean: 13x+2y-10x-7y then it is an algebraic expression that can be simplified to 3x-5y
5y+8=7y subtract 5y from each side , 5y+8=7y -5y -5y 8=2y /2 /2 4=y
5y+8 = 7y-6 5y-7y = -6-8 -2y = -14 y = 7
2y+5y=10 7y=10 y=10/7
y = 14
7y + 4 = 5y - 6Subtract 4 from each side:7y = 5y - 10Subtract 5y from each side:2y = -10Divide each side by 2:y = -5
6y=5y+2y 6y=7y that does't work its unequal -
The value of x is 11, and the value of y is 8.
7y - 6 = 5y - 147y - 5y = 6 - 142y = -8y = -8 ÷ 2y = -4
2y - 7 + 5y = 0 Collecting like terms together, 7y - 7 = 0 or 7y = 7 So that y = 1
The lines intersect at (3, 5)