Can you explain to me what i am supposed to do because i dont get it at all

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marbuscis99

03.09.2022

Mathematics

Consider equation 3.5 + 1.2(6.3- 7x) = 9.38.

1. Use distributive property

$a\cdot (b-c)=a\cdot b-a\cdot c.$

Then

$1.2(6.3- 7x)=1.2\cdot 6.3-1.2\cdot 7x=7.56-8.4x.$

2. Combine 3.5 and 7.56, then

3.5 + 1.2(6.3- 7x) = 3.5+7.56-8.4x=(3.5+7.56)-8.4x=11.06-8.4x.

3. Subtract 11.06 from both sides. You'll get

$-8.4x=9.38-11.06,\\ \\-8.4x=-1.68,\\ \\x=0.2.$

possible steps are 2, 4 and 5.

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