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kodGreya [7K]
3 years ago
9

The perimeter of a rectangle is 42 cm. The longer side has length of 7 cm more than the shorter side. Find the length of longer

side
Mathematics
2 answers:
Lelu [443]3 years ago
5 0
So to solve, make an equation (x being the shorter side)
2x+2(7+x)=42
So just solve from here.
2x + 14 + 2x =42
4x=28
x=7 
So the shorter side is 7, and the longer side is 14.
vovikov84 [41]3 years ago
5 0
To find perimeter, we use this equation.
2L+2W=42
Let's say the longer side is the length.
L=W+7
Let's plug that in for L.
2(w+7)+2w=42
2w+14+2w=42
Add like terms.
4w+14=42
Subtract 14 from both sides.
4w=28
Divide.
28÷4=7=W
The shorter side is 7, which means the longer side is 14 cm.
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