10x + 1 = 2(3× + 5) - 1

x = 2

Step-by-step explanation:

10x + 1 = 2(3x + 5) - 1

x=2

Step-by-step explanation:

First expand 2(3x+5)

                         6x+10

Which will give you,

10x+1=6x+10-1

then subtract 6x to both sides

4x+1=10-1

then subtract 1 to both sides

4x+2=10

then subtract 2 to both sides

4x=8

then divide them both by 4

x=2

c-4 is the final answer! : )

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.