Question 133402
{{{(c+d)x+(c-d)x=c^2}}} Start with the given equation



{{{x((c+d)+(c-d))=c^2}}} Factor out the GCF x from the left side



{{{x(2c)=c^2}}} Combine like terms



{{{x*(cross(2c)/cross(2c))=c^2/2c}}} Divide both sides by 2c



{{{x=c/2}}} Simplify