28 August, 18:28
What is the answer?
28 August, 19:29
x is-1 and y is - 4
28 August, 20:28
x-y=3 ... (1)
7x-y=-3 ... (2)
From (1) make x the subject of formula by adding y to both sides
x=3+y ... (3)
Substitute (3) into (2)
7 (3+y) - y=-3
Open the bracket
Substrate 21 from both sides
Divide both sides by 6
Substitute the value of y into (3)
Therefore x is-1 and y is - 4
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» X-y=3 7x-y=-3 What is the answer?