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x=4
b)2x+3=11
2x=8
x=4
c)4m-16=2m
4m-2m=16
2m=16
m=8
d)3k+1=k+7
3k-k=7-1
2k=6
k=3
x = 4
____________
2x + 3 = 11
2x = 8
x = 4
____________
4m - 16 = 2m
2m = 16
m = 8
____________
3k + 1 = k + 7
2k = 6
k = 3