Simplify this algebraic expression completely. 6x – 4(x + 3)
2 answers:
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Answer:
x = 5
Step-by-step explanation:
Since ∠P ≅ ∠P and ∠PST≅ ∠PRQ (corresponding angles are congruent when the lines are parallel), ΔPST is similar to ΔPRQ by the AA postulate
Therefore, corresponding sides are in proportion.
PS ↔ PR and ST ↔ RQ
Note: PR = PS + SR = x + 7 + x - 1 = 2x + 6
8(x + 7) = 6(2x + 6)
8x+56 = 12x + 36
4x = 20
x = 5