Solve 0.8*(15+30)-x=0.2x

$$0.8 \times ( 15 + 30 ) - x = 0.2 x$$

Solve for x

$$x=30$$

Steps for Solving Linear Equation

Add 15 and 30 to get 45.

$$0.8\times 45-x=0.2x$$

Multiply 0.8 and 45 to get 36.

$$36-x=0.2x$$

Subtract 0.2x from both sides.

$$36-x-0.2x=0$$

Combine -x and -0.2x to get -1.2x.

$$36-1.2x=0$$

Subtract 36 from both sides. Anything subtracted from zero gives its negation.

$$-1.2x=-36$$

Divide both sides by -1.2.

$$x=\frac{-36}{-1.2}$$

Expand \frac{-36}{-1.2} by multiplying both numerator and the denominator by 10.

$$x=\frac{-360}{-12}$$

Divide -360 by -12 to get 30.

$$x=30$$