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If "a" is taken away from the sum of "b" and 7 we get 21​
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If "a" is taken away from the sum of "b" and 7 we get 21​

User Heitor
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Answer:

(b+17) - a = 21

b - a = 21-17

b - a = 4

or,

a - b = -4

Explanation:

User JeffbRTC
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