Question

1) Nas figuras, a//b//c Calcule x:

Answer 1

Resposta:

a) x=3              b) x=2

Explicação passo-a-passo:

$\frac{2x+2}{4}=\frac{5x-1}{7}\\\\7(2x+2)=4(5x-1)\\14x+14=20x-4\\14x-20x=-4-14\\-6x=-18\\x=3$

$\frac{2}{3x}=\frac{3}{4x+1}\\\\2(4x+1)=3(3x)\\8x+2=9x\\8x-9x=-2\\-x=-2\\x=2$