7.5
10x+4y+11xy
(14x-2y)+(7x-3y)+(-3x) = 14x-2y+7x-3y-3x =(14+7-3)x-(2+3)y =18x-5y
7x-4020+3x= 7x+-4020+3x= 7x+3x+-4020= 10x+-4020= 10x-4020
-46 = 3x + 7x
3+3x+7x=13 3x+7x=10 10x=10 x=1
3x+7x+3+y= 10x+3+y
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
10x + 5 which is also equal to 5(2x + 1)
simplify it, 7x-12=x+2+2x-3x 7x=2+12+3x-3x 7x=14 x=2
7x - 9 = 3x + 5 7x - 3x - 9 = 5 7x - 3x = 5 + 9 4x = 14 x = 14/4
-4x