Question

a*(b+c)=2640 a*b=1240 a*c=?

Answer 1

a*b+a*c=2640
1240+a*c=2640
a*c=2640-1240
a*c=1400

Answer 2

a*(b+c)= a*b+a*c=2640
1240+a*c=2640=> a*c= 1400
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