2x+ 1=7
2x=6
x=3
2. Solution: (x+8)÷8=6 (both sides of the equation are multiplied by 8 at the same time)
x+8=48
x=40
3. Solution: 4(x+3)=32×3
x+3=32×3/4
x+3=24
x=2 1
4. Solution: 3(x+5)-42= 12.
3(x+5)=54
x+5= 18
x= 13
5. Solution: (10x-90+2x)÷2=75 (both sides of the equation are multiplied by 2 at the same time)
10x-90+2x= 150
12x=240
x=20
6. Solution: (7x-3x+59)÷3=29 (both sides of the equation are multiplied by 3 at the same time)
7x-3x+59=87
4X+59=87
4X= 146
X=36.5
7. Answer: 9x-8 = X.
8x=8
x= 1
8. Solution:12x+12 =16x.
16x- 12x= 12
4x= 12
x=3
9. Solution: 144÷x+6= 12.
144÷x= 12-6
144÷x=6
6x= 144
x=24
10, solution: 125÷-5=5.
There is no unknown X on the topic. I guess the topic is 125÷x-5=5.
125÷x= 10
10x= 125
x= 12.5