2(y+3)+5(2y-5) = 2y+6 + 10y -25 = 12y -19
6(5y+3) -8 (-3+6y) = 30y +18 - (-24+48y) = 30y +18 +24 -48y = -18y +42
2x -3 = -7
2x = -7+3
2x = -4
x = -2
4x = 2x+3
4x-2x = 3
2x = 3
x = 3/2
t/-7 = 5/2 = 2t/-14 = 35/14
2t = 35
t = 17.5
4y/5 = 2/15 = 12y/15 = 2/15
12y = 2
y = 2/12 ou 1/6
