(i) Solve the following simultaneous equations:
4x + 3y - 4 = 0; 6x = 8 - 5y.
Answers
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Answer:
x = -2 and y = 4
Step-by-step explanation:
4x + 3y = 4 ... (i) x 5
6x + 5y = 8 ... (ii) x 3
Multiply equation (i) by 5 and (ii) by 3
20x + 15y = 20 ... (iii)
18x + 15y = 24 ... (iv)
equation (iii) - (iv), we get,
20x - 18x + 15y - 15y = 20 - 24
2x + 0 = -4
x = -4 / 2
x = -2
Using x = -2 in (i)
4 * (-2) + 3y = 4
-8 + 3y = 4
3y = 4 + 8
3y = 12
y = 12 / 3
y = 4
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