Question

Найдите сумму корней уравнений 13-(7+х)=2 и (х-6):4=5

Answer 1

1. 13-(7+x)=2
x=13-7-2
x=4

Answer 2

$7 + x = 13 - 2 \\ 7 + x = 11 \\ x = 11 - 7 \\ x = 4$