Question

resolva as equações a seguir a) 3(x-1)-(x-3)+5(x-2)=18 b) 5(x-3)-4(x+2)=2+3(1-2x)​

Answer 1

Explicação passo-a-passo:

$a)3.(x - 1) - (x - 3) + 5.(x - 2) = 18$

$3x - 3 - x + 3 + 5x - 10 = 18$

$(3 - 1 + 5).x - 10 = 18$

$7x = 18 + 10 \\ 7x = 28 \\ x = \frac{28}{7}$

$x = 4$

$b)5.(x - 3) - 4.(x + 2) = 2 + 3.(1 - 2x)$

$5x - 15 - 4x - 8 = 2 + 3 - 6x$

$5x + 6x = 2 + 3 + 8 + 15$

$11x = 28 \\ x = \frac{28}{11}$