Question

Решите пропорции 3x+4/28=1/4

Answer 1

3x+1/7=1/4
3x=1/4-1/7
3x=7/28-4/28
3x=3/28
x=3/28 делить на 3
x=1/28

Answer 2

3х + 4 / 28 = 1/4
4 * (3х + 4) = 28 * 1
12х + 16 = 28
12х = 28 - 16
12х = 12
х = 12 : 12
х = 1