2x - 3y = 10 8x + 3y = 20
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How to solve 5x + 7y = 66
2x - 3y = -20
By elimination method.
Asked by eshaanbayale51.9spicertl | 2nd Jun, 2020, 01:05: PM
Expert Answer:
5x + 7y = 66 ... (1)
2x - 3y = -20 ... (2)
Multiplying (1) by 3 and (2) by 7, we get
15x + 21y = 198 ... (3)
14x - 21y = - 140 .... (4)
Adding (3) and (4), we get
19x = 58
→ x = 2
From (1),
5(2) + 7y = 66
→ 7y = 56
→ y = 8
The solution is x = 2 and y = 8.
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