A few days ago
math? please anyone to show me?…?
3/4x – 5/2z = -2
-1/2x + 3/2 y = 5/2
.4x + .3z = 2.2 solve
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A few days ago
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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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