Solve 3x+90+3.6*15+4.5(25-x)=225

$$3x+90+3.6 \times 15+4.5(25-x)=225$$

Solve for x

$$x=21$$

Steps for Solving Linear Equation

Multiply 3.6 and 15 to get 54.

$$3x+90+54+4.5\left(25-x\right)=225$$

Add 90 and 54 to get 144.

$$3x+144+4.5\left(25-x\right)=225$$

Use the distributive property to multiply 4.5 by 25-x.

$$3x+144+112.5-4.5x=225$$

Add 144 and 112.5 to get 256.5.

$$3x+256.5-4.5x=225$$

Combine 3x and -4.5x to get -1.5x.

$$-1.5x+256.5=225$$

Subtract 256.5 from both sides.

$$-1.5x=225-256.5$$

Subtract 256.5 from 225 to get -31.5.

$$-1.5x=-31.5$$

Divide both sides by -1.5.

$$x=\frac{-31.5}{-1.5}$$

Expand \frac{-31.5}{-1.5} by multiplying both numerator and the denominator by 10.

$$x=\frac{-315}{-15}$$

Divide -315 by -15 to get 21.

$$x=21$$