Answer:
x = 20
Step-by-step explanation:
x + 29 = 49
- 29 - 29
x=20
One hundred fifty three thousand
4(8+1); Peter is adding one marker to each box so we add 1 to 8 first because of order of operations (PEMDAS). There are 9 markers in each of the four boxes, 9 x 4 is 36 markers total
