Question 102160
{{{180-x = 6*(90-x)}}}



{{{180-x = 540-6x}}} Distribute



{{{180-x+6x = 540}}} Add 6x to both sides



{{{-x+6x = 540-180}}} Subtract 180 from both sides




{{{5x = 360}}} Combine like terms



{{{x = 72}}} Divide both sides by 5 to solve for x