Resuelves las siguientes ecuaciones1?
Resuelves las siguientes ecuaciones 1. X + 3 = 7 2. 9 + x = 12 3. 2x = 19 - 5 4. X - 8 = 12 5. 5x = 20 6. 3x = 29 - 8 7. X - 21 = 86 8. (x + 2) - 1 = 7.
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1) x + 3 = 7
x + 3 - 3 = 7 - 3
x + 0 = 4
x = 4
2) 9 + x = 12 - 9 + 9 + x = 12 - 9
0 + x = 3
x = 3
3) 2x = 19 - 5
2x = 14
x = 14 / 2
x = 7
4) x - 8 = 12
x - 8 + 8 = 12 + 8
x = 20
5) 5x = 20
x = 20 / 5
x = 4
6) 3x = 29 - 8
3x = 21
x = 21 / 3
x = 7
7) x - 21 = 86
x - 21 + 21 = 86 + 21
x = 107
8) x + 2 - 1 = 7
x + 1 = 7
x + 1 - 1 = 7 - 1
x = 6.