Question 195123
Are you sure that the equation isn't {{{3y-21+xy-7x}}} ??



{{{3y-21+xy-7x}}} Start with the given expression



{{{(3y-21)+(xy-7x)}}} Group like terms



{{{3(y-7)+x(y-7)}}} Factor out the GCF {{{3}}} out of the first group. Factor out the GCF {{{x}}} out of the second group



{{{(3+x)(y-7)}}} Since we have the common term {{{y-7}}}, we can combine like terms



So {{{3y-21+xy-7x}}} factors to {{{(3+x)(y-7)}}}