please answer question 13 and 14
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13. 6 + x = 7(x-3)
= 6 + x = 7x - 21
= 7x - x = 21 + 6
= 6x = 27
= x = 27/6
14. a. - 40 - 70 + 50
= -110 + 50
= -60
b. 50 - 10 - 20 + 30
= 80-30
= 50
= 6 + x = 7x - 21
= 7x - x = 21 + 6
= 6x = 27
= x = 27/6
14. a. - 40 - 70 + 50
= -110 + 50
= -60
b. 50 - 10 - 20 + 30
= 80-30
= 50
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