Answer:
11a − 29b − 50
Step-by-step explanation:
Subtract 7 from − 3
7a − 21b − 10 − 40 + 4a − 8b
Add 7a and 4a
11a - 21b - 10 - 40 - 8b
Subtract 8b from -21b
11a - 29b - 10 - 40
Subtract 40 from -10
11a - 29b - 50
⇒ ‐3 + 7(a – 3b – 1) – 4(10 – a + 2b)
distribute inside parenthesis
⇒ -3 + 7a - 21b - 7 - 40 + 4a - 8b
collect like terms
⇒ 7a + 4a - 21b - 8b - 3 - 7 - 40
add or subtract like terms
⇒ 11a - 29b - 50
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