Math, asked by vineetakumar30, 1 year ago

linear equations in one variable :-
4 - 2(z-4) = 1 (2z+5)
3 2

vineetakumar30: plz answer fast.... its urgent!

Anonymous: 1 min

vineetakumar30: thnx

Anonymous: answered

Anonymous: its correct

pravin3103: underline is just below 2(z-4) or 4 - 2(z-4)

vineetakumar30: according to the textbook's back answer , the answer's supposed to be 5/2

vineetakumar30: underline's just below 2(z-4)

vineetakumar30: textbook : rs aggarwal for 8th grade

vineetakumar30: i have exam tommorow, its an important question which i am not able to solve correctly,plz help!!!!!

Answers

Answered by pravin3103

4 - 2(z-4) = 1 (2z+5)
3 2

$\frac{12-2z+8}{3} = \frac{(2z + 5)}{2}$

$\frac{20-2z}{3} = \frac{(2z + 5)}{2}$

((20-2z) * 2 = (2z + 5) * 3
40 - 4z = 6z + 15
40 -15 = 6z + 4z
25= 10z
10z = 25
z = 25/10
z = 5/2

pravin3103: 1/2 (2z+5) = 1/2 * (2z+5)

vineetakumar30: the mistake i was doing was that i changed them into like fractions by taking the lcm as we do in addition and subtraction

pravin3103: ok

pravin3103: all d best for ur exam

vineetakumar30: thnx a ton!!!!!!! :)

vineetakumar30: gr8 help b4 exams...!

pravin3103: welcome

vineetakumar30: bye' gotta go n study!

pravin3103: bye

pravin3103: tc

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linear equations in one variable :-4 - 2(z-4) = 1 (2z+5) 3 2

Answers

linear equations in one variable :-
4 - 2(z-4) = 1 (2z+5)
3 2