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You are here: Experts > Science > Math for Kids > Basic Math > solveing linear equations
Basic Math - solveing linear equations
Expert: Lynn Houston - 10/26/2009
Question
Hi lynn,
can you please show me in steps, as each time i do these, i get a different answer :-(
1. 5+ x/3=7
2. 1/2x-1=5
3. 3/4x-2=1/3x+3
Answer
The easiest way to handle these is to start by getting rid of the fractions. To do that, multiply by the denominator of the fraction or fractions.
1. (3)5+ 3x/3=7(3)
15 + x = 21 subtract 15 from both sides
x = 6
2. (2)1/2x-1(2)=5(2)
x - 2 = 10 add 2 to each side
x = 12
3. (3)(4)(3/4x)-2(3)(4)=(3)(4)(1/3x)+3(3)(4)
9x - 24 = 4x + 36 subtract 4x and add 24 to both sides
5x = 60 divide by 5
x = 12
Make sense?
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