Equation: 42x + 25X = 13413 (x + 5) = 169 1.42x+25x=134 2.13（x+5）=169

42x+25x=134
67x=134
x=134÷67
x=2
13（x+5）=169
x+5=169÷13
x+5=13
x=8

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