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8b) solve the pair of simultaneous equations:
9x + 7y = 10
3x + y = 2

A: can't see the image.

8b: 9x + 7y = 10... equation 1

3x + y = 2...equation 2

make y the subject of the formula using equation 2

y=2 - 3xequation 3

substitute for y using equation 3

9x + 7(2 - 3x) = 10

9x + 14 - 21x = 10

9x - 21x = 10 - 14

-12x = -4

divide both sides by -12

x = 1/3

substitute for x using equation 2

3(1/3) + y = 2

1 + y = 2

y = 2 - 1

y = 1

so x = 1/3 and y = 1

$16

Step-by-step explanation:

28/7=4

4*4=16