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Butoxors [25]
4 years ago
10

What is the value of r? 1.2r−1 1.3r=40

Mathematics
1 answer:
Alexus [3.1K]4 years ago
4 0
  the value is 
1.2r-11.3r=40

-10.Ir=40
r=40/-10.1
r=-0.2525
 
hope this helps :):):)
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Answer:

\boxed{x = 10}

Step-by-step explanation:

=  > 2x + 12 =  - 2(4 - 2x) \\  \\  =  > 2x + 12 =  (( - 2) \times 4) - (( - 2) \times 2x) \\  \\  =  > 2x + 12 =  - 8 - ( - 4x) \\  \\  =  > 2x + 12 =  - 8 + 4x \\  \\  =  > 2x - 4x + 12 =  - 8 \\  \\  =  >  - 2x + 12 =  - 8 \\  \\  =  >  - 2x =  - 8 - 12 \\  \\  =  >   \cancel{-} 2x =   \cancel{- }20 \\  \\  =  > 2x = 20 \\  \\  =  > x =  \frac{20}{2}  \\  \\  =  > x = 10

6 0
3 years ago
Read 2 more answers
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