July 2022 1 13 Report
Determina el valor de x en cada ejercicio y realiza la comprobación.

x + 27 =15
x - 42 =48
9x + 5 =31
11x + 9 =75
4x + 12 =7 x - 9
x - (4 - x) =7 - (x + 2)
9 - 6x =4x - (3 - 2x)
5x - 5 (2x + 1)= - 3 (4x + 4)
x - (1 - 3x) = 8x-1
3x + 2 (4x - 1) = x + 18
4x + 2 (x + 3) = 2 (x + 9)
3x + (2x - 1) = 3 (x + 2) - 4 ​

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