Question 261878
To write in the form y = mx + b, we need to solve for y.
(i) x+y=4
subtract x to get
 y = -x+4
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(ii) 2x+y=6
subtract 2x to get
y = -2x + 6
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Both are now in y = mx+ b form
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If you wanted the values of x and y that make them consistent, then we get
x = 2
y = 2