Question 216927
Let J = the number of computers Julius sold and S = the number of computers Sam sold.
1) {{{J = 5*S}}} "Julius sold 5 times as many computers as Sam sold..."
2) {{{J+S = 78}}} "In total, they sold 78 computers."
Substitute the J in eqation 1) into equation 2) and solve for S.
3) {{{(5*S)+S = 78}}}
3a) {{{6S = 78}}}
3b) {{{S = 13}}} so:
{{{J = 5(13)}}}
{{{J = 65}}}
Julius sold 65 computers.