Answer:
Step-by-step explanation:
4x=12
x=12/4
x=3 answer
y=4*3=12 answer.
z=8-3=5 answer.
proof
3+12+5=20
20=20
Answer:
3,12,5
Step-by-step explanation:
sum of three numbers = 20
sum of first and third = 8
second number = sum of three - sum of first and third = 20-8=12
second number = 4* first
first = 12/4 = 3
third = 8-3 = 5
