We first add both 19.8 by 19.8 and therefore, that would give us 39.6.
42 - 39.6 = 2.4.
2.4 ÷ 2 = 1.2
1.2 would be the length of each sides.
Answer:
<em>Exact Form:
</em>

<em>Decimal Form:
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<em>Mixed Number Form:
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Hope this helps :)
<em>-ilovejiminssi♡</em>
The new value would be $134.40; 1.12 times 120
(35 + 47 + 42 + x) / 4 = 50
(124 + x) / 4 = 50....multiply both sides by 4, cancelling the 4 on the left side.
124 + x = 50 * 4
124 + x = 200
x = 200 - 124
x = 76 <===