Showing posts with label the expression. Show all posts
Showing posts with label the expression. Show all posts

Monday, May 6

Math Help Gateways

Introduction to math help gateways:

Math help gateways are websites that help students to learn math. Tutor vista is one of the best website which act as a gateway and help students in solving their homework problems and clear their doubts. This article for math help gateways covers the solving algebraic equation with step by step. After viewing this article student understand the concept and prepared well from math help gateways.


Math help gateways:


Example 1:

Find the value of the expression 12x+7 , if x= 4

Solution:

Substitute x = 4 in the given expression 12x + 7

12x + 7 = 12(4) + 7

= 48+ 7

X  = 55

Here the value of the expression is 55.

Example 2:

Solve: 2x - 2 = 38

Solution:

Given, 2x - 2 = 38

2x = 38 + 2

2x = 40

x = `40/2`

or    x = 20

Example 3:

Solve the following system:

x + y = 14 - (1)

4x - y = 11 - (2)

Solution:

Solve the (1) equation

y =14 -x

substitute in (2)equation

4x - (14 - x)=11

4x - 14 + x=11

5x=25

x=5

substitute value of x in (1)equation

5 + y=14

y=9

The solution is, (5, 9).

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Math help gateways:


Example 4:

One seventh of a certain number is 17. find out certain number.

Solution:

let the unknown value be x. one seventh of x is `( 1/7 ) * x`

so,  `( 1/7 ) * x` = 17

x = 17 * 7

x = 119

the number is  119.

Example 5:

If four times of a number is equal to 10. Then find what exactly the number is?

Solution:

let us assume the unknown number as " X "

Given   4 * X = 10.

Move left side term to right

Then          X = `10/4`

The unknown number x is

X = 2.5

Example 6:

Given :

12x - 2(7x-10x+2)+x.

Solution:

First simplify those brackets. So we multiply (7x-10x+2) with 2

So, 14x - 20x + 4

It can be written as 12x - 14x + 20x - 4 + x.

add the like terms

So,answer is (19x - 4)