Answer:
x=28
Explanation:
Simplifying
0.25x + 0.1x = 9.8
Combine like terms: 0.25x + 0.1x = 0.35x
0.35x = 9.8
Solving
0.35x = 9.8
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '0.35'.
x = 28
Simplifying
x = 28