Math, asked by sarmada, 1 year ago

what is the answer of above question?

Attachments:

sarmada: the answer may be -2,5,&7
sarmada: not amp only 7, it is my typing mistake

Answers

Answered by amarjeet71307
1
x-3y+2z=-3
x=-3+3y+2z.................(1)

put x=-3+3y+2z

5x+6y-z=13
5(-3+3y+2z)+6y-z=13
-15+15y+10z+6y-z=13
21y+9z=13+15
21y+9z=28
y=(28-9z)/21....................(2)

put y=(28-9z)/21 in eq (1)

x=-3+3(28-9z)/21+2z
x=-3+(28-9z)/7+2z
x=3+28/7-9z/7+2z..............take Lcm 7
x=(21+28-9z+14z)/7
x=(49+5z)/7..............................(3)

put x = (49+5z)/7
y = (28-9z)/21

4x-y+3z=8
4(49+5z)/7+(28-9z)/21+3z=8
196/7+20z/7+28/21-9z/21+3z=8........take Lcm 21
(588+60z+28-9z+63z)/21=8
588+28+60z+63z-9z=8*21
616+123z-9z=168
616+114z=168
114z=168-616
z=-502/114
z=-251/57

put z=251/57 in eq (2) and (3)

y = (28-9z)/21
y = (28-9(-251/57))/21
y = (28+(2259)/57)/21
y = ((1596+2259)/57)/21
y = (3855)/57*21
y = 3855/1197
y = 1285/399

x = (49+5z)/7
x = (49+5(251/57))/7
x = (49+(1255/57))/7
x = (2793+1255)/57*7
x = 4048/399

x = 4048/399, y = 1285/399, z = -251/57

I Hope this answer help you
make me brainliest

sarmada: definitely
amarjeet71307: ok
amarjeet71307: make me brainliest plz.......
Similar questions