Question

решите уравнение
x+2(x+10)=7

Answer 1

x+2x+20=7
3x=7-20
3x=-13
x=-13/3

Answer 2

x + 2×(x + 10) = 7;

x + 2x + 20 - 7 = 0;

3x = - 13;

x = - 13 / 3.