The mean weight of four members of the wrestling team is 155 pounds. if three of them have weights of 125, 183, and 169 pounds, then what does the fourth wrestler weigh?

The fourth wrestler weighs 143 pounds.

125+183+169+143 = 620

620/4 = 155

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116