Question

resolva em R as seguintes equacoes de 1 grau : 5(3-x)+2(x+1)=-x+5

Answer 1

$5(3-x)+2(x+1)=-x+5 \\ 15-5x+2x+2=-x+5 \\ -5x+2x+x=5-2-15 \\ -2x=-12 \\ x= \frac{-12}{-2} =6$

Answer 2

5(3-x)+2(x+1)=-x+5
15-5x+2x+2=-x+5
17-3x=-x+5
-3x+x=5-17
-2x=-12
2x=-12(-1)
2x=12
x=12/2
x=6
Espero ter ajudado.