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Due tmrw pls help on A and B

Due tmrw pls help on A and B-example-1

1 Answer

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Answer:

(a) x= 20 (b) x= 41

Explanation:

(a)

180-54= 126

360-126-90= 144

7x+4= 144

7x= 140

x= 20

(b)

(n-2)(180)= (5-2)(180)

= 540

(2x-10)+3x+(4x+20)+(2x-5)+(2x+2)= 13x+7

13x+7= 540

13x= 533

x= 41

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