21x + 27 = 300
21x = 300 - 27 = 273
x = 300/21 = 14.3
Solve the equation 21x + 27 = 300 using systematic trials. Explain each step.
2 answers
21x + 27 = 300
21*10 + 27 = 237 -- too small
21*20 + 27 = 447 -- too big
21*15 + 27 = 342 - too big
21*14 + 27 = 321 -- too small
21*13 + 27 = 300
21*10 + 27 = 237 -- too small
21*20 + 27 = 447 -- too big
21*15 + 27 = 342 - too big
21*14 + 27 = 321 -- too small
21*13 + 27 = 300