solve the following equations by trial - and - error method :
2x + 7 = 3 x
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Answer:
=>2x + 7 = 3 x
=>2x – 3x = –7
=>–x = –7
=> x = 7
ans) 7
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Answered by
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Answer:2x-3x=-7(transposing method used make sure, correct and easy than trail and terror method )
-1x=-7
x=7
trial and terror ( use transposing method to verify )
consider x as1
then(NOTE: x is also used as a sign of multiplication hope you can identify)
2 x 1 + 7 =3 x1 thus it is false
consider x as 2
2 x 2 + 7= 3 x 2
thus flase
then you have to consider x as 3 ,4,5,6
and when you reach 7 you will get the right answer
2 x 7 + 7= 3 x 7
21=21
:Hope this was helpful
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