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Procedimiento
2x - 9 = 25
2x = 25 + 9
2x = 34
x = 34 ÷ 2
x = 17
b) se trata del 228
Procedimiento
1/3x + 24 = 100
1/3x = 100 - 24
1/3x = 76
x = 76 ÷ 1/3
x = 228