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desireemilkmanPosted - 30 January 2002 3:43  Show Profile
i dont understand what the heck
2x+7=11
means nor do i understand how to do it!!
:-( help
dlandu Posted - 8 February 2002 19:8  Show Profile
hi i''m happy to help.

when you are asked to solve 2x+7=11, what you do is:
having 2x+7=11
add(-7)to the left hand side and the right hand side of the equations to collect like terms
i.e 2x+7-7=11-7
this leaves you with
2x=4
then to find x, you divide both sides of the equation by 2
i.e 2x/2=4/2
working it out, you get:
x=2

NOTE: If you want to be sure your answer is correct just substitute 2 for x in the equation 2x+7=11
i.e (2*2)+7=11
4+7=11
this means that 2 is the answer.

i hope u understand my explanation

shikhartandon Posted - 12 April 2002 10:24  Show Profile
See the equation u have given is of the form ax+b=c where a , b , c are any three numbers.The equation acyually means find a number ''x'' such that if u multiply it with a and add b to the result then u should get c. And here x is given by the formula
x = ( c-b)/a
Try solving the equations for practice
3x+2=8
5x+5 = 15
9x+2 = 20

Here the number beside x xan be substituted to a in the formula and the no after + symbol can be substituted for b and the number after = can be substituted for c in the formula and u can get the answer.Check out ul get the value pf x =2 in all the equations

shikhartandon Posted - 12 April 2002 10:24  Show Profile
See the equation u have given is of the form ax+b=c where a , b , c are any three numbers.The equation acyually means find a number ''x'' such that if u multiply it with a and add b to the result then u should get c. And here x is given by the formula
x = ( c-b)/a
Try solving the equations for practice
3x+2=8
5x+5 = 15
9x+2 = 20

Here the number beside x xan be substituted to a in the formula and the no after + symbol can be substituted for b and the number after = can be substituted for c in the formula and u can get the answer.Check out ul get the value pf x =2 in all the equations

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