Question

3x+5x-3=7

4(2x+1)=12

Answer 1

`3x+5x-3 = 7`

`(3+5)x-3=7`

`8x - 3 = 7`

`8x=7+3`

`8x=10`

`x=10:8`

`x=5/4`

______________________________

`4.(2x+1)=7`

`2x+1=7:4`

`2x+1=7/4`

`2x=7/4-1`

`2x=7/4-4/4`

`2x=3/4`

`x=3/4:2`

`x=3/4xx1/2`

`x=3/8`