Hello Guys i was doing a Algebra SAT question.. and it was logical so i believe i got the right answer but in the future i don't want to get confuse so is there anyway to set an equation for this ?.
If 2x+2x+2x+2x=12 Then what is 2x-1=
I got that X is 2 because 2.2=4,2.2=4 2.2=4 =12 so 2.2-1=3
But i really don't know what would i ahve done if it was a bigger number..
It makes a big difference if there are three or four of them. If there are three, then you're correct, and x = 2. You also correctly computed 2x-1, although your notation of using '.' for multiplication is not a good one for numbers. Use the asterisk: * for multiplication.
If what was a bigger number?But i really don't know what would i ahve done if it was a bigger number..
The question should have .
Simple strategy: "Take a guess"
Try to take a reasonable guess for . Let's try . Then , too big.
So let's try . Then . Just right.
So and .
Note that you can do all of these computations quickly in your calculator.
After you're comfortable with the method of "guessing", also try to solve the problem algebraically.