Question 210868
P = 2(L+W) Substitute P = 7x+10 and L = 5.
{{{7x+10 = 2(5+W)}}}
{{{7x+10 = 10+2W}}} Subtract 10 from both sides.
{{{7x = 2W}}} Divide both sides by 2.
{{{highlight(W = (7/2)x)}}}