3x+12=5x-21
-5x -5x
-2x + 12 = -21
-12 -12
-2x=-33
x = 16.5
Answer:
Step-by-step explanation:
Number of boxes = 11
1 box = 6 bags
11 boxes = 6 x 11
11 boxes = 66 bags
1 bag = 45 marbles
66 bags = 45 x 66
66 bags = 2970 marbles
Answer: The shop ordered 2970 marbles.
A° = 38, b°= 90, c° = 38
the square on the angle opposite to b shows that it is a right angle which means it’s 90°
