Question

observe as figuras e descubra o valor das incógnitas​

Answer 1

Resposta:

Explicação passo a passo:

$\frac{x}{25} =\frac{60}{40} \\40.x=1500\\x=\frac{1500}{40} \\\\x= 37,5$

$\frac{2x-2}{3x+1} =\frac{4}{7} \\\\(2x-2).7=4.(3x+1)\\14.x-14=12.x+4\\14.x-12.x=4+14\\2.x=18\\x=\frac{18}{2}\\x=9$