Question

3x5 photo enlarged new photo is 7inches find width of new photo

Answer 1

length and bredth should be proporyionally same
so 5/7=3/x
find x

Answer 2

\[\frac{ 5 }{ 7 }=\frac{ 3 }{ x }\]\[5\times x=5x\]\[7\times3=21\]-----------\[5x=21\]\[5x \div5=x\]\[21\div5=4.2\]-------------\[x=4.2\]