Question

simplify to create an equivalent expression6(5r-11)-(5-r)my answer is 29r-71correct answer is 31r-71 how is it 31r when the r is negative and 30r is positive

Answer 1

We want to simplify the expression;

So, the mistake you made is to forget to multiply the negative r by -1 when expanding.

- 1 x - r = + r

The equivalent expression is ,therefore , 31r - 71