Algebra Exam revision

math 2019

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12228I have a Summer Exam , at the begging of next week on all topics that we have done , so I decided to do Algebra , but I forgot have to do it , because it was a while ago, can anyone show me the method again please to memorize.
Thanks in advance
 

lev888

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View attachment 12228I have a Summer Exam , at the begging of next week on all topics that we have done , so I decided to do Algebra , but I forgot have to do it , because it was a while ago, can anyone show me the method again please to memorize.
Thanks in advance
Do you know how to combine like terms? (4x and 3x, 5 and 6)
Do you know how to solve 5x=15?
 

math 2019

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x=3
 

lev888

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math 2019

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divide by 3 both sides
both I haven't clue how to do longer ones
 

lev888

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How do you simplify 4x+5=3x+6 so it looks similar to 5x=15?
 

math 2019

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Is it :( 4x-3x=1x)=(5+6=11)
1x/1=11/1
x=11
 

lev888

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Is it :( 4x-3x=1x)=(5+6=11)
1x/1=11/1
x=11
4x-3x is correct.
5+6 is not, do you know why?
Also, when you are simplifying equations do each step on a new line instead of using "=".
 

Harry_the_cat

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Whatever you do to one side of an equation, you have to do to the other.
Think of an equation as a scale balance with 4x + 5 on one side and 3x + 6 on the other.
4x + 5 = 3x + 6
Take away 3x from each side:
1x + 5 =6
Now take away 5 from each side:
x = 1

Check your answer. Does 4*1 +5 = 3*1 +6?
 

Otis

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