Question

necesito hallar el valor de x en cada ecuación

1_ X+7=15. ⚪2_ 4X=20 ⚪ 3_ X+X=18

4_ X-5=4. 5_ X:6=7 6_ 17-X=5

Answer 1

1) x + 7 = 15
x = 15 - 7
x = 8

2) 4x = 20
x = 20/ 4
x = 5

3) x + x = 18
2x = 18
x = 18/2
x = 9

4) x - 5 = 4
x = 4 + 5
x = 9

5) x/6 = 7
x = 7 ( 6 )
x = 42

6) 17 - x = 5
- x = 5 - 17
- x = - 12
x = 12