Answer:
1/4 is the number
a.k.a. 0.25
Step-by-step explanation:
Replace the words "a number" with x
4x + 2 = 3
Then, simplify
4x = 1
x = 1/4
Its 8.5
I calculator
12.4+-3.9=8.5
its 126
the answer is 0.16 & -12.16