Statement : 2(x+10)=7x-15
Reason : Original equation
Statement : 2x+20=7x-15
Reason : Distribute 2 through the parentheses
Statement : 20=5x-15
Reason : Move the variable to the right-hand side and change its sign and then subtract the like terms
Statement : 35=5x
Reason : Move the constant to the left-hand side and change its sign and subtract the like terms
Statement : 7=x
Reason : Divide both sides of the equation by 5
Statement : x=7
Reason : Change the sides of the equation