Answer:
69 is her age
Step-by-step explanation:
Set the equation:
400 - 2x = 262
Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.
First, subtract 400 from both sides
400 (-400) - 2x = 262 (-400)
-2x = -138
Next, divide -2 from both sides
(-2x)/-2 = (-138)/-2
x = -138/-2
x = 69
