Question

I need full solution

Answer 1

EC = 11 units

Explanation:

• first we find the value of x

10 + 2x + 19 = x + 20

2x - x = 20 - 10 - 19

x = -9

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check

10 + 2(-9) + 19 = -9 + 20

10 - 18 + 19 = -9 + 20

11 = 11

same value the answer is good

• Now we find EC

EC = 10 + 2x + 19

EC = 10 + 2(-9) + 19 (remember PEMDAS)

EC = 10 - 18 + 19

EC = 11 units

Answer 2

11= EC

Explanation:

EC = 10 + 2 x + 19

= x + 20

So 2 x + 29 - x - 20 = 0

so x + 9 = 0

x = -9.

EC = x + 20 = -9+20 = 11.