Question

Socorro me ajudem pfvrrrr​

Answer 1

Resposta:

a) 15

Explicação passo-a-passo:

$\frac{5}{2} (x+20-x) = 20+2x\\\\\frac{5}{2} (20) = 20+2x\\\\\frac{100}{2} = 20 + 2x\\\\ 50 = 20+2x\\50-20 = 2x\\30 = 2x\\\frac{30}{2} = x \\15 = x$

x = 15