Question

7x+5x-7=21+10x

Tell whether it has one solution, an infinite number of solutions, or no solutions, and identify the equation as an identity, a contradiction, or neither.
Give step by step explanation

Answer 1

One Solution

Explanation:

Step 1:

7x + 5x - 7 = 21 + 10x Equation

Step 2:

12x - 7 = 21 + 10x Add

Step 3:

2x - 7 = 21 Subtract 10x on both sides

Step 4:

2x = 28 Add 7 on boths sides

Step 5:

28 ÷ 4 Divide

Answer:

x = 7

Hope This Helps :)