7. Solve using elimination.
3x + 2y = 16
7x+y=19
Answers
Step-by-step explanation:
3x + 2y = 16;7x + y = 19
This deals with simplification or other simple results.
Given: 3x + 2y = 16 ..(i)
7x + y = 19 ..(ii)
By using elimination method,
3x + 2y = 16 × 7
7x + y = 19 × 3
21x + 14y = 112
21x + 3y = 57
- - -
11y = 55
y = 5
now in eq. (i) putting the value of y,
3x + 2y = 16
⇒ 3x = 16 - 2(5)
⇒ 3x = 6
∴ x = 2
∴ So the value of x = 2 and y = 5
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