Answer:
x=13
Step-by-step explanation: x+7=20, x = 13 : x=13
Steps:
x+7=20
Subsitute x = 13
[13+7=20]
Check
[20-x=7]
Simplify
[20 = 20]
The solutions to the system of equations are x=13.
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Explanation:
1. Rewrite:
x + 7 = 20
2. Subtract 7 from both sides:
x = 13
So it is true x = 13, or 13 = 13
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