4x+3x=21+1
7x=21+1
7x=22
x=22/7
2(x+1)=8
x+1=8/2
x+1=4
x=4−1
x=3
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4x+3x=21+1
7x=21+1
7x=22
x=22/7
2(x+1)=8
x+1=8/2
x+1=4
x=4−1
x=3