Question

а) 13× + 15× =84 б) 18 у- 7у =22

Answer 1

а)13х+15х=84
28х=84
х=84/28
х=3
б)18у-7у=22
11у=22
у=22/11
у=2

Answer 2

1.
13x+15x=84
28x=84
x=84:28
x=3
2.
18y-7y=22
11y=22
y=22:11
y=2