A few days ago
argentina_mandy20

math? please anyone to show me?…?

3/4x – 5/2z = -2

-1/2x + 3/2 y = 5/2

.4x + .3z = 2.2 solve

Top 1 Answers
A few days ago
triste

Favorite Answer

3/4x – 5/2z=-2 ———–(1)

-1/2x + 3/2y = 5/2 ———–(2)

.4x+ .3z=2.2 ————(3)

(1) = 3x – 10z = -8

x = (-8+10z)/3 ———-(4)

subst (4) into (3)

2/5[(-8 + 10z)/3] + 3/10z = 11/5

4[(-8 + 10z)/3] +3z =22

(-32 +40z)/3 +3z =22

-32 + 40z +9z = 66

49z = 66 + 32

49z = 98

z=2

subst z = 2 into (4)

x=[-8+2(10)]/3

x= 12/3

x= 4

subst x =4 into (2)

-1/2(4) + 3/2y =5/2

2 + 3/2 y = 5/2

4 +3y =5

3y = 5-4

3y = 1

y = 1/3

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