Question 25305
x-7y=10
x-4y=5
We will solve this by substitution;
first solve equation 1 for x;
x=10+7y
Now substitute that into equation 2 for x;
(10+7y)-4y=5
10+3y=5
3y=5-10
3y=-5
y={{{-5/3}}}
Now plug this answer for y in the equation;
x-4{{{(-5/3)}}}=5
x-{{{(-20/3)}}}=5
x+{{{20/3}}}=5
x=5-{{{20/3}}}
x={{{15/3}}}-{{{20/3}}}
x={{{-5/3}}}
Hope you understand
=)