Question

1) у-4-2у-5=6у+5
2) 3р-1-(р+3)=1
3) 5(2у-4)+2(5у-1)=18
4) 6(1-2х)-3(1-6х)=-39

Answer 1

Ответ:

$1)y - 4 - 2y - 5 = 6y + 5 \\ - y - 9 = 6y + 5 \\ - y - 6y = 5 + 9 \\ - 7y = 14 \\ y = - 2$

$2)3p - 1 - (p + 3) = 1 \\ 3p - 1 - p - 3 = 1 \\ 2p - 4 = 1 \\ 2p = 4 + 1 \\ 2p = \frac{5}{2}$

$3)5(2y - 4) + 2(5y - 1) = 18 \\ 10y - 20 + 10y - 2 = 18 \\ 20y - 22 = 18 \\ 20y = 18 + 22 \\ 20y = 40 \\ y = 2$

$4)6(1 - 2x) - 3(1 - 6x) = - 39 \\ 6 - 12x - 3 + 18x = - 39 \\ 3 + 6x = - 39 \\ 6x = 39 - 3 \\ 6x = 42 \\ x = - 7$