If the sum of a number and four is doubled, the result is one less than the number. Find the number.
1 answer:
Answer:
Step-by-step explanation:
Equation
2(x + 4) = x - 1
Solution
2x + 8 = x - 1 Subtract x from both sides
2x-x + 8 = - 1 Combine the left
x + 8 = - 1 Subtract 8 from both sides
x + 8-8 = - 1-8
x = - 9
Check
<em>LHS</em>
2(-9 + 4)
2(- 5)
-10
<em>RHS</em>
-9 - 1
- 10
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