Question

3 (x - 2) - (1 - x ) = 13

3 (y - 3) + 4 = 2 [ - ( y - 4 ) - 4 ( 2y + 1)]

3,5x + 1 = 3 + 3,1x

Answer 1

3x-6-1+x =13
4x-7=13
4x=13+7
4x=20
x=5


3y-9+4=2(-y+4-8y-4)
3y-5=2(-9y)
3y-5=-18y
-5=-18y-3y
-5=-21y
21y/5


3,5x+1=3+3,1x
3,5x-3,1x=3-1
0,4x=2
x=5