Question

What is the angle x of a triangle? Solve with this equation.

60+x+100= 180​

Answer 1

20

Explanation:

60+x+100=180 is the equation we are asked to solve.

Using commutative property of addition you can rewrite as:

x+60+100=180

Using associative property of addition you can rewrite as:

x+(60+100)=180

Combine like terms/simplify:

x+(160)=180

x+160=180

Use subtraction property of equality to rewrite as:

x+160-160=180-160

Simplify both sides:

x+0=20

Apply the additive identity property:

x=20

So x=20.

Check.

60+x+100=180 with x=20:

60+20+100=180

80+100=180

180=180

The last line I have here is true so x=20 has been verified as the solution.