Answer:
x = 3
Step-by-step explanation:
Step 1: Write out equation
x + 9 = 18 - 2x
Step 2: Add 2x on both sides
x + 2x + 9 = 18 - 2x + 2x
3x + 9 = 18
Step 3: Subtract 9 on both sides
3x + 9 - 9 = 18 - 9
3x = 9
Step 4: Divide both sides by 3
3x/3 = 9/3
x = 3
Answer:
7
Step-by-step explanation:
Substitute the value of the variable into the expression and simplify.
Answer:
-13 + 8 = -5 (negative number)
Step-by-step explanation:
1.
(-21) - (-22)
-21 + 22 = 1 (positive number)
2.
(-13) - (-8)
-13 + 8 = -5 (negative number)
3.
15 - (-7) - 19
15 + 7 - 9
22 - 9 = 13 (positive number)
4.
(-37) - (-45)
-37 + 45 = 8 (positive number)
Hope this helps!
Answer:
5400 cm3
Step-by-step explanation:
45 x 12 x 10
= 5400
