Answer:
x=6 is a solution
the right side should be 80
Explanation:
![8x + 8 = 56](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3ewt9xh4m4soscduowdxl0zosumbarpqwn.png)
To check whether x=6 is a solution , plug in 6 for x
![8(6) + 8 = 56](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1fn038svp7l49t0cpub6ssacujpbxev5pb.png)
![48+8= 56](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6bs8qduwsf9ptmkul8xil2vgghnd0upyy8.png)
56=56 both sides are equal
So x=6 is a solution
Suppose the solution x=6 increases to x=9, and the left side of the equation
stays the same.
Lets take left hand side
![8x+8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/zci8hjxifxk23vuoffgm125ea6lrx86twz.png)
Replace x with 9
![8(9)+8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wmgs1v5kuse8ck677a54ofmwnxcaqqjmea.png)
![72+8=80](https://img.qammunity.org/2020/formulas/mathematics/middle-school/85k01fa6thfntouspcl8phae1trdry5gsy.png)
So the right side should be 80