Question

1)8x+5=7x+9
2) 3(4x-1)+3(2x-5)

Answer 1

8х+5=7х+9
8х=7х=9-5
х=4
Ответ:4

3(4x-1)+3(2x-5)=18х=18
(12х-3)+(6х-15)
12х-3+6х-15
18х-18
Ответ: 18х-18