Question

find the value of x and y if 5x minus 3 Y = 8, x + Y = 12 please tell me in copy please dont spam​

Answer 1

Answer:

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Step-by-step explanation:

5x-3y = 8   ---- eqn 1

x+y = 12     ---- eqn 2

From eqn 2

x = 12-y     ---- eqn 3

Substitute eqn 3 into eqn 1

5(12-y) - 3y = 8

60-5y-3y = 8

60 - 8y = 8

60 - 8 = 8y

52 = 8y

divide both sides by 8

y = 6(1/2)

put y into eqn 3

x = 12-y

x = 12 -6(1/2)

x = 12 - 13/2

x = (24-13)/2

x = 11/2

x = 5(1/2)

∴ x = 5(1/2) and y = 6(1/2)

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