Question

What is the value of m, if (-3)m+1×(-3)5=(-3)7?

Answer 1

$- 3m + 1 \times( - 3)5 = ( - 3)7 \\ - 3m + ( - 15) = ( - 3)7 \\ - 3m - 15 = - 21 \\ - 3m = - 21 + 15 \\ - 3m = - 6 \\ m = - 6 \div - 3 \\ m = 2$
i hope this helps u