Question

a)xy+3(xy-5x)+8x
b)3y-5(-1+2y)-10

Answer 1

A) xy+3xy-15x+8x =0
4xy = 15x-8x
4xy = 7x
corta x com x
4y = 7
y=7/4

B) 3y+5-10y-10=0
-7y = -5+10
-7y= 5 (-1)
7y=-5
y = -5/7