Solve 75*0.3+68*0.25+84*0.25+xdiv5=71.8

$$75 \times 0.3+68 \times 0.25+84 \times 0.25+x \div 5=71.8$$

Solve for x

$$x=56.5$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 5.

$$375\times 0.3+340\times 0.25+420\times 0.25+x=359$$

Multiply 375 and 0.3 to get 112.5.

$$112.5+340\times 0.25+420\times 0.25+x=359$$

Multiply 340 and 0.25 to get 85.

$$112.5+85+420\times 0.25+x=359$$

Add 112.5 and 85 to get 197.5.

$$197.5+420\times 0.25+x=359$$

Multiply 420 and 0.25 to get 105.

$$197.5+105+x=359$$

Add 197.5 and 105 to get 302.5.

$$302.5+x=359$$

Subtract 302.5 from both sides.

$$x=359-302.5$$

Subtract 302.5 from 359 to get 56.5.

$$x=56.5$$