Can somebody please help me with this substitution problem??? 4x+7y=-11
-6x+y=51
Please explain:-)

Question

Can somebody please help me with this substitution problem??? 4x+7y=-11
                   -6x+y=51
Please explain:-)

parthkohli · Answer

The easiest way you could use substitution is by solving for $y$ in the second equation.$$y = 51 + 6x$$Now make the above substitution in the first equation.$$4x + 7(51 + 6x) = -11$$

anonymous · Answer

Ok so it should look like: 38x+357=-11

helder_edwin · Answer

$$ \large -11=4x+7(51+6x)=4x+357+42x=46x+357 $$

anonymous · Answer

Thanks a bunch!!!

anonymous · Answer

Sorry to bother you, but the answer that I got for x was -8...I keep getting a weird number for y, can you explain to me how you get it please?

helder_edwin · Answer

$$ \large 46x=-11-357=-368\Rightarrow x=-368/46=-8 $$

helder_edwin · Answer

$$ \large y=51+6x=51+6(-8)=51-48=3 $$