7/9х + 4 = 2/3х + 8
7/9х - 2/3х = 8 - 4
7/9х - 2/3х = 7/9х - 6/9х = 1/9х 1/9х = 4 х = 4 : 1/9 х = 4 * 9 : 1 х = 36
1/2х + 1/6х = х - 3
1/2х + 1/6х - х = -3
1/2х + 1/6х = 3/6х + 1/6х = 4/6х = 2/3х
2/3х - 1х = 2/3х - 3/3х = - 1/3х
-1/3х = -3
х = -3 : -1/3 х = 3 * 3 : 1 х = 9
5.1 - 8х = 3.3 - 10х
-8х + 10х = 3.3 - 5.1
2х = - 1.8
х = - 1.8 : 2 х = -0.9
0.7 * ( 2 - 3у) = -7
2 - 3у = - 7 : 0.7
2 - 3у = - 10
-3у = -10 - 2 -3у = - 12 у = 4
7/9х + 4 = 2/3х + 8
7/9х - 2/3х = 8 - 4
7/9х - 2/3х = 7/9х - 6/9х = 1/9х 1/9х = 4 х = 4 : 1/9 х = 4 * 9 : 1 х = 36
1/2х + 1/6х = х - 3
1/2х + 1/6х - х = -3
1/2х + 1/6х = 3/6х + 1/6х = 4/6х = 2/3х
2/3х - 1х = 2/3х - 3/3х = - 1/3х
-1/3х = -3
х = -3 : -1/3 х = 3 * 3 : 1 х = 9
5.1 - 8х = 3.3 - 10х
-8х + 10х = 3.3 - 5.1
2х = - 1.8
х = - 1.8 : 2 х = -0.9
0.7 * ( 2 - 3у) = -7
2 - 3у = - 7 : 0.7
2 - 3у = - 10
-3у = -10 - 2 -3у = - 12 у = 4