13х+27=16х+4,5 21х+45=17+14х 13х+70=2х+15

Предыдущий
вопрос Следующий
вопрос

1) 13x + 27 = 16x + 4.
Subtract 13x from both sides
27 = 3x + 4.
Subtract 4.5 from both sides
22.5 = 3
Divide by 3
x = 7.5

2) 21x + 45 = 17 + 14
Subtract 14x from both sides
7x + 45 = 1
Subtract 45 from both sides
7x = -2
Divide by 7
x = -4

3) 13x + 70 = 2x + 1
Subtract 2x from both sides
11x + 70 = 1
Subtract 70 from both sides
11x = -5
Divide by 11
x = -5