Question

4- resolva: A) 2 ( X - 2 ) +5 ( 2 - X ) + 6 (X + 1 ) = 0 B) X / 3 + X / 2 = 15

Answer 1

A) 2(x-2)+5(2-x)+6(x+1)=0
2x-4+10-5x+6x+6=0
8x-5x+16-4=0
3x+12=0
3x=-12
x=-12/3
x=-4

B) x/3+x/2=15
2x/6+3x/6=15
5x/6=15
5x=15*6
5x=90
x=90/5
x=18