If 3x + 6 = 213x plus 6 equals 21, what does x + 2x plus 2 equal?
2 answers:
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Answer:
y = 3
Step-by-step explanation:
The 2 right triangles inside the right triangle are similar, then ratios of corresponding sides are equal, that is
=
( cross- multiply )
y² = 63 ( take the square root of both sides )
y = = 3