Solve (1.5*1+1.5*1+x*1.5)*4=42

$$(1.5 \times 1+1.5 \times 1+x \times 1.5) \times 4=42$$

Solve for x

$$x=5$$

Steps for Solving Linear Equation

Divide both sides by 4.

$$1.5\times 1+1.5\times 1+x\times 1.5=\frac{42}{4}$$

Reduce the fraction \frac{42}{4} to lowest terms by extracting and canceling out 2.

$$1.5\times 1+1.5\times 1+x\times 1.5=\frac{21}{2}$$

Multiply 1.5 and 1 to get 1.5.

$$1.5+1.5\times 1+x\times 1.5=\frac{21}{2}$$

Multiply 1.5 and 1 to get 1.5.

$$1.5+1.5+x\times 1.5=\frac{21}{2}$$

Add 1.5 and 1.5 to get 3.

$$3+x\times 1.5=\frac{21}{2}$$

Subtract 3 from both sides.

$$x\times 1.5=\frac{21}{2}-3$$

Convert 3 to fraction \frac{6}{2}.

$$x\times 1.5=\frac{21}{2}-\frac{6}{2}$$

Since \frac{21}{2} and \frac{6}{2} have the same denominator, subtract them by subtracting their numerators.

$$x\times 1.5=\frac{21-6}{2}$$

Subtract 6 from 21 to get 15.

$$x\times 1.5=\frac{15}{2}$$

Divide both sides by 1.5.

$$x=\frac{\frac{15}{2}}{1.5}$$

Express \frac{\frac{15}{2}}{1.5} as a single fraction.

$$x=\frac{15}{2\times 1.5}$$

Multiply 2 and 1.5 to get 3.

$$x=\frac{15}{3}$$

Divide 15 by 3 to get 5.

$$x=5$$