# 4Tests Forums

**Author** |
**Topic** |

desireemilkman | Posted - 30 January 2002 3:43 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 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 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 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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