1)7+3x-4=0
3x+3=0
3x=3
x=1
2)2×(4x+2)-12=0
8x+4-12=0
8x-8=0
8x=8
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1)7+3x-4=0
3x+3=0
3x=3
x=1
2)2×(4x+2)-12=0
8x+4-12=0
8x-8=0
8x=8
x=1