13).5×+1=16
5×3+1=16
14).3(2×+5)=3×+9
6×+15=3×+9
6×-3×=9-15
3×=-6
×=-2
×+5=-2+5=3
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13).5×+1=16
5×3+1=16
14).3(2×+5)=3×+9
6×+15=3×+9
6×-3×=9-15
3×=-6
×=-2
×+5=-2+5=3