Question

Solve the following pairs of linear equations by cross-multiplication method:
7x + 8y = 2
2x + 13y − 22 = 0

Answer 1

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Answer 2

Answer:

i) x + y =5 and 2x –3y = 4

By elimination method

x + y =5 ... (i)

2x –3y = 4 ... (ii)

Multiplying equation (i) by (ii), we get

2x + 2y = 10 ... (iii)

2x –3y = 4 ... (ii)

Subtracting equation (ii) from equation (iii), we get

5y = 6

y = 6/5