For this case, the first thing we must do is define a variable.
We have then:
x: George Sisler's average
y: Suzuki's average
We then have the following equation that models the problem:
[tex]x = 0.070 + y
[/tex]
Substituting values we have:
[tex]x = 0.070 + 0.350
x = 0.420[/tex]
Answer:
Sisler's batting average that year was:
x = 0.420