6t=2t-12 5x=-x-13 5y=2y+9

Question

6t=2t-12
5x=-x-13
5y=2y+9

Answer 1

6t = 2t - 12
6t - 2t = - 12
4t = - 12
t = - 12 : 4
t = - 3
-----------------

5х = - х - 13
5х + х = - 13
6х = - 13
х = - 13 : 6
х = - 2 1/6
-----------------

5y = 2y + 9
5y - 2y = 9
3y = 9
y = 9 : 3
y = 3
--------------------

Answer 2

Переносом неизвестные а левую часть с противоположным знаком
6t-2t=-12
4t=-12
t=-12÷4
t=-3
2)5x+x=-13
6x=-13
x=-13÷6
x=-2 1/6
3)5y-2y=9
3y=9
y=9÷3
y=3