How do I solve for x

Y=mx+c what the person said before

Say your equation is y=mx+c

to solve for x you rearrange the equation to make x the subject (x = ...)

to do this; you move the c to the other side;

y-c=mx becomes - c as its on the other side now

then to get x on its own

(y-c) / m=x you divide by m as it is times by on the other side

then to solve, you will normally be given values for the other components (y, m, c) so you plug in the numbers and calculate x