How do you solve #35x - 5y = 20# and #y = 7x + 4# using substitution?
See a solution process below:
Step 1) Because the second equation is already solved for
This indicates there are no solutions to this system of equations. Or, no solution set is the empty or null set:
This also indicates, if there is no solutions, that these equations represent parallel lines.
"Substitute" the expression for y in the second equation into the first one.
0 does not = 40, so there is no solution to this set.
Converting both to slope-intercept form gives us:
They are parallel lines (same slope) with different intercepts (4 and -4).