Question

(X- 10) + (2x + 40 ) not perce​

Answer 1

Answer:

$(x - 10) + (2x + 40) \\ \\ x - 10 + 2x + 40 \\ \\ x + 2x - 10 + 40 \\ \\ \fbox{ \: \: 3x + 20 \: \: \: }$

Answer 2

Answer:

x - 10

+ 2x +40

= 3x + 30

therefore 3x = -30

x = -30 / 3

x = -10

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