Question

WILL MARK BRAINLIEST IF UNDER 6 MINS FROM RSM! HELP! The difference between a and b is 12. The number a is 5 more than 3 times the number b. Which of the following pairs of equations could be used to find the values of a and b? (A) b−a=12 a=3b+5 (B) a−b=12 b=3a+5 (C) a/b =12 a=3b+4 (D) a−b=12 a=3b+5 (E) b−a=12 3b=a+5

Answer 1

Answer:

Choice D.  a - b = 12  and  a = 3b + 5

Step-by-step explanation:

so   |a - b| = 12  

a = 3b + 5

3b + 5 - b  = 12

2b + 5 = 12

b = 7/2

what if  b - a = 12

b - 3b - 5 = 12

-2b = 17

b < 0  no.

choice A. works  so does choice D.)