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How do you solve the equation #4.2r+7.14=12.6#?

Answer 1

See the entire solution process below:

Step 1) Subtract #color(red)(7.14)# from each side of the equation to isolate the #r# term while keeping the equation balanced:

#4.2r + 7.14 - color(red)(7.14) = 12.6 - color(red)(7.14)#

#4.2r + 0 = 5.46#

#4.2r = 5.46#

Step 2) Divide each side of the equation by #color(red)(4.2)# to solve for #r# while keeping the equation balanced:

#(4.2r)/color(red)(4.2) = 5.46/color(red)(4.2)#

#(color(red)(cancel(color(black)(4.2)))r)/cancel(color(red)(4.2)) = 1.3#

#r = 1.3#

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Answer 2

Isaiah Anthony

To solve the equation 4.2r + 7.14 = 12.6, you would first subtract 7.14 from both sides to isolate the term with the variable. This gives you 4.2r = 5.46. Then, you would divide both sides by 4.2 to solve for r. So, r = 5.46 ÷ 4.2, which simplifies to approximately r = 1.3.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.