Answer:
none
Step-by-step explanation:
A. -7+4x=9 4x=9+7 x=4
B. x= -1
C. x = -32/19
D. x = -6
E. x = -12
F. x= 0
Answer:
A,C and E have solution x=4
B and F have solution x=0
Step-by-step explanation:
We have to find the equations which have same solution.
A.[tex]-(7-4x)=9[/tex]
[tex]-7+4x=9[/tex]
[tex]4x=9+7=16[/tex]
[tex]x=\frac{16}{4}=4[/tex]
B.[tex]12=-4(-6x-3)[/tex]
[tex]12=24x+12[/tex]
[tex]24x=12-12=0[/tex]
[tex]x=\frac{0}{24}=0[/tex]
C.[tex]5x+34=-2(1-7x)[/tex]
[tex]5x+34=-2+14x[/tex]
[tex]34+2=14x-5x[/tex]
[tex]36=9x[/tex]
[tex]x=\frac{36}{9}=4[/tex]
D.[tex]14=-(x-8)[/tex]
[tex]14=-x+8[/tex]
[tex]x=8-14=-6[/tex]
E.[tex]-8=-(x+4)[/tex]
[tex]-8=-x-4[/tex]
[tex]x=-4+8=4[/tex]
F.[tex]x+5=-5x+5[/tex]
[tex]x+5x=5-5=0[/tex]
[tex]6x=0[/tex]
[tex]x=\frac{0}{6}=0[/tex]
A,C and E have same solution because when we substitute x=4 then it satisfied the given equations.It does not depend on solving the equations.
B and F have same solution because when we substitute x=0 then it satisfied the given equations.
