Question

Somente as q tem o risco azul

Answer 1

15
x + y = 163
x ÷ y = 5 + 7
x = 5y + 7
5y + y = 163-7
6y = 156
y = 26
x + 26 = 163
x = 137

18
R = 2p - 4
R - 10 = 3(P-10)
R - 10 = 3P - 30
R = 3P - 20
Substituindo o R
3P - 20 = 2p - 4
P = 16
R = 28