Answer:
-30
Step-by-step explanation:
Evaluate 4 a + 7 b + 3 a - 2 b + 2 a where a = -5 and b = 3:
4 a + 7 b + 3 a - 2 b + 2 a = -5×4 + 7×3 - 5×3 - 2×3 - 5×2
4 (-5) = -20:
-20 + 7×3 - 5×3 - 2×3 - 5×2
7×3 = 21:
-20 + 21 - 5×3 - 2×3 - 5×2
3 (-5) = -15:
-20 + 21 + -15 - 2×3 - 5×2
-2×3 = -6:
-20 + 21 - 15 + -6 - 5×2
2 (-5) = -10:
-20 + 21 - 15 - 6 + -10
-20 + 21 - 15 - 6 - 10 = 21 - (20 + 15 + 6 + 10):
21 - (20 + 15 + 6 + 10)
| 1 |
| 2 | 0
| 1 | 5
| 1 | 0
+ | | 6
| 5 | 1:
21 - 51
21 - 51 = -(51 - 21):
-(51 - 21)
| 5 | 1
- | 2 | 1
| 3 | 0:
Answer: -30
