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2 years ago

I need help on this question (^～^;)ゞ

Mathematics

1 answer:

vfiekz [6]2 years ago

7 0

Answer:

21) x = 0

23) x = 7

Step-by-step explanation:

In a parallelogram, the opposite sides are congruent. Using this fact, we can create equations for both problems.

21)

$2x + 18 = 18$

Subtract 18.

$2x = 0$

Divide by 2.

$x = 0$

23)

$2x - 3 = 11$

Add 3.

$2x = 14$

Divide by 2.

$x = 7$

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