Which is the correct way to model the equation x + 8 = 7 x + (-8) using algebra tiles?
2 answers:
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Answer:
<h2>x = 28</h2>Step-by-step explanation:
ΔARP and ΔCRD are similar. Therefore the sides are in proportion:
We have:
AR = 10 + x
CR = x
PR = 15 + 42 = 57
DR = 42
Substitute:
<em>cross multiply</em>
<em>use distributive property</em>
<em>subtract 42x from both sides</em>
<em>divide both sides by 15</em>