subtract the sum of 5a-7b + 7 and -4a - 7 plus 4b from the sum of 9a-7-2b and 14b-2a+4
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Step-by-step explanation:
5a -7b +7
+ -4a -7
= a - 7b
9a -7 -2b
+ -2a +4+14b
= 7a -3 +12b
substracting them, we get,
7a +12b -3
- + a -7b
(-) (+)
= 6a + 19b -3
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