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Collect like terms

Add sides 4


Divide sides by 7


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Thus ;




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1/2(5 sqrt 2)(4 sqrt 2)= 20
Answer:
x = 10
Step-by-step explanation:
1) Subtract x from both sides.
4x − x = 30
2) Simplify 4−x to 3x
3x = 30
3) Divide both sides by 3
x = 
4) Simplify
to 10
x = 10