15x+3x=252
18x=252
x=14
3*14=42 children
Answer:
1) -16
2) +3
Step-by-step explanation:
1) below represents negative sign
2) increase means posivie sign
Step-by-step explanation:
The answers are proved by replacing x with 3 and 6 respectively.
5x+2=47 subtract 2 from both sides
5x=45 divide both sides by 5
x=9
Answer:
they will all add up to 360 degrees
Step-by-step explanation: