When solving a system by multiplying and then adding or subtracting, how do you decide whether to add or subtract?

i don’t know if your school does PEMDAS but it stands for parentheses, exponents, multiplication, division, addition, and then subtraction. so you would multiply, then add, and then subtract.

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine