if the sum of twice a number and - 7 is increased by 8 the result is 16 greater than the opposite of the number. What is the num
ber?
1 answer:
2x + -7 +8 = -x+16
2x + 1 = -x +16
2x +1 -1= -x +16 -1
2x+x = -x +x + 15
3x = 15
3x/3 = 15/3
x= 5
2(5) + -7 +8 = -5+16
10 +-7+8 = 11
11=11
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Option C
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