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Elden [556K]
3 years ago
11

1: make x the subject: 4(x+y) = z 2: make b the subject: ab + cd = e

Mathematics
2 answers:
kkurt [141]3 years ago
7 0

Answer:

1.x=(z/4)-y

2.b=(e-cd)/a

Step-by-step explanation:

1.

z=4(x+y)

Divide both sides by 4

z/4=x+y

Subtract y from both sides

(z/4)-y=x

Answer

x=(z/4)-y

2.

ab+cd=e

subtract cd from both sides

ab=e-cd

divide both sides by a

b=(e-cd)/a

Answer

b=(e-cd)/a

AURORKA [14]3 years ago
4 0

Answer:

1)  x = \frac{z}{4} - y

2) b = \frac{e}{a} - \frac{cd}{a}

Explanation:

(1) Making x the subject: 4(x + y) = z

To make x the subject of original expression, we send the x to the left side of expression and all of the other components to the right side of expression.

The detail procedure is described as following:

    4(x + y) = z

Apply associate property:

<=> 4x + 4y = z

Send 4y to the right side (the sign of 4y must be changed from positive to negative):

<=> 4x = z - 4y

Divide both sides by 4:

<=> x = \frac{z}{4} - y

(2) Make b the subject: ab + cd = e,  applying the similar procedure in part (1):

      ab + cd = e

Send cd to the right side (the sign of

<=> ab = e - cd

Divide both sides by a:

<=> b = \frac{e}{a} - \frac{cd}{a}

Hope this helps!

:)

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