Solve: x+y=14, x−y=4
x−y=14……(i)
x+y=4……(ii)
on solving equation (ii), we get
y=4−x
By substitution method, putting the value of y in equation (i), we get
x−(4−x)=14
⇒x−4+x=14
⇒2x=14+4
⇒x=182
∴x=9
and, y=4−9=−5
so, x=9,y=−5
Solve, using cross-multiplication
5x+4y+14=0 3x=−10−4y