Answer:(question8 x=28),(question9 x=18),(question10 x=22),(question11 x=45)
Explanation:
Question 8
2x+1+33=90
2x+34=90
2x=90-34
2x=56
Divide both sides by 2
x=56/2
x=28
Question 9
3x+11+25+90=180
3x+126=180
3x=180-126
3x=54
Divide both sides by 3
x=54 ➗ 3
x=18
Question 10
5x+12=6x-10
Collect like terms
6x-5x=12+10
x=22
Question 11
45+3x=180
3x=180-45
3x=135
Divide both sides by 3
x=135 ➗ 3
x=45