Question

practice
solve for x.

1. 8x = 64
2. x + 2 = 11
3. x ÷ 20 = 120
4. x - 17 = 13
5. x ÷ 12 = 2
6. 8 + x = 25
7. 7x = 77
8. x - 236 = 450
9. 26 = 13x
10. x + 21.9 = 27.1
11. 2,448 ÷ 48 = x
12. x + 15 = 31

Explanation:

Step1: Isolate x (divide by 8)

$x = \frac{64}{8}$

Step2: Calculate value of x

$x = 8$

Step1: Isolate x (subtract 2)

$x = 11 - 2$

Step2: Calculate value of x

$x = 9$

Step1: Isolate x (multiply by 20)

$x = 120 \times 20$

Step2: Calculate value of x

$x = 2400$

Step1: Isolate x (add 17)

$x = 13 + 17$

Step2: Calculate value of x

$x = 30$

Step1: Isolate x (multiply by 12)

$x = 2 \times 12$

Step2: Calculate value of x

$x = 24$

Step1: Isolate x (subtract 8)

$x = 25 - 8$

Step2: Calculate value of x

$x = 17$

Step1: Isolate x (divide by 7)

$x = \frac{77}{7}$

Step2: Calculate value of x

$x = 11$

Step1: Isolate x (add 236)

$x = 450 + 236$

Step2: Calculate value of x

$x = 686$

Step1: Isolate x (divide by 13)

$x = \frac{26}{13}$

Step2: Calculate value of x

$x = 2$

Step1: Isolate x (subtract 21.9)

$x = 27.1 - 21.9$

Step2: Calculate value of x

$x = 5.2$

Step1: Calculate value of x

$x = \frac{2448}{48}$

Step2: Simplify to find x

$x = 51$

Step1: Isolate x (subtract 15)

$x = 31 - 15$

Step2: Calculate value of x

$x = 16$

Answer:

1. $x=8$
2. $x=9$
3. $x=2400$
4. $x=30$
5. $x=24$
6. $x=17$
7. $x=11$
8. $x=686$
9. $x=2$
10. $x=5.2$
11. $x=51$
12. $x=16$