Answer:
x=7
Step-by-step explanation:
Step 1: Subtract 4x from both sides.
x+30−4x=4x+9−4x
−3x+30=9
Step 2: Subtract 30 from both sides.
−3x+30−30=9−30
−3x=−21
Step 3: Divide both sides by -3.
−3x
−3
=
−21
−3
<u><em>The sides of a rhombus are all congruent (the same length.)</em></u>
Answer: 9 gallons
<u>Step-by-step explanation:</u>
Set up the proportion, then multiply to solve for the variable.



9 gallons = x
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Answer:
$39.68
Step-by-step explanation:
12.40÷2.4=4.96
4.96×8=39.68