If A=x-1A=x−1 and B=x+2,B=x+2, find an expression that equals 3A-3B3A−3B in standard form.

A = x - 1

3A = 3 * (x - 1) = 3x - 3

B = x + 2

3B = 3*(x + 2) = 3x + 3*2 = 3x + 6

3A - 3B = 3x - 3 - (3x + 6) = 3x - 3 + 3x*(-1) - 6*(-1)

            = 3x - 3 -3x - 6

            = 0 - 9

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5