math_celebrity Administrator Staff member Oct 26, 2016 #1 A number is represented by an arbitrary variable, let's call it x. 7 times x means we multiply 7 times x. 7x 2 minus 7x is written: 2 - 7x
A number is represented by an arbitrary variable, let's call it x. 7 times x means we multiply 7 times x. 7x 2 minus 7x is written: 2 - 7x