2007-01-28 17:01:02 · 26 answers · asked by tyeserhule 1 in Science & Mathematics ➔ Mathematics
4x + 20 = 36
subtract 20 to both sides
4x = 16
divide both sides by 4
x = 4
2007-01-28 17:05:23 · answer #1 · answered by Anonymous · 4⤊ 0⤋
4
2007-01-28 17:16:01 · answer #2 · answered by Michael T 1 · 0⤊ 0⤋
4
2007-01-28 17:10:10 · answer #3 · answered by amanda 3 · 0⤊ 0⤋
4
2007-01-28 17:09:27 · answer #4 · answered by Aldith A 1 · 0⤊ 0⤋
4
2007-01-28 17:09:03 · answer #5 · answered by Anonymous · 0⤊ 0⤋
4
2007-01-28 17:04:46 · answer #6 · answered by Anonymous · 0⤊ 0⤋
4
2007-01-28 17:04:17 · answer #7 · answered by irish 1 · 0⤊ 0⤋
x=4
2007-01-28 17:15:49 · answer #8 · answered by dan 1 · 0⤊ 0⤋
x = 4
2007-01-28 17:08:29 · answer #9 · answered by jc freak 2 · 0⤊ 0⤋
4x+20 = 36 Subtract 20 from each side
4x+20-20 = 36-20
4x = 16
4x/4 = 16/4
x = 4
2007-01-28 17:09:03 · answer #10 · answered by READER 1 5 · 1⤊ 0⤋
To answer this type of question, you need to know the following :
1. The objective is to find the unknownn which can be represented by a to z and in this case, the unknow is x.
2. how the sign change when you move them between the right and left hand side of the equal = sign. When you move from left to right of = sign,
addition become subtraction
subtraction become additional
multiplication become division
division become multiplication
the same rule apply when you move from right to left of = sign.
There is no way out but to memorise the above rules.
To make thing easy, keep the unknown on the left hand side and then start moving the rest of the items onto to the right hand side. It is easier to see and clearer on the working
4x + 20=36 (keep 4x on left and move +20 to right to become -20)
4x = 36-20
4x = 16 (keep x on left and move *4 to right to become /4)
x = 16 / 4
x= 4
The answer is x=4.
To double check your answer, substitutes x=4 into the equation to prove that it is correct.
4x+20=36
4(4) + 20 = 36
16 + 20 = 36
36=36
Proved
2007-01-28 18:39:57 · answer #11 · answered by cls22cls 2 · 0⤊ 0⤋