What is the value of x if 2x – 3 = 15?
2x-3 = 15
2x = 18 (subtract 3 from both sides)
x = 18/2 (divide by 2 on both sides)
x = 9
Thats easy! It's not geometry! It's Pre Algebra! But anyways, this is how to solve it:
2x-3=15 Add 3 to both sides to get the x alone.
+3 +3 Now the 3 is gone because you added 3 to negative 3.
2x=18 Now you just divide.
2 2 Divide 2 to both sides of the equation.
Now 2 is gone and 18 divided by 2 is............9!
x=9 is the answer!
9
x=9
2x - 3 = 15
2x = 15 + 3
2x = 18
x = 18 divided by 2
x(9) = (2*9=18) - 3 = 15
so x has to be 9
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Verified answer
2x-3 = 15
2x = 18 (subtract 3 from both sides)
x = 18/2 (divide by 2 on both sides)
x = 9
Thats easy! It's not geometry! It's Pre Algebra! But anyways, this is how to solve it:
2x-3=15 Add 3 to both sides to get the x alone.
+3 +3 Now the 3 is gone because you added 3 to negative 3.
2x=18 Now you just divide.
2 2 Divide 2 to both sides of the equation.
Now 2 is gone and 18 divided by 2 is............9!
x=9 is the answer!
9
x=9
2x - 3 = 15
2x = 15 + 3
2x = 18
x = 18 divided by 2
x = 9
9
x(9) = (2*9=18) - 3 = 15
so x has to be 9