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Stella [2.4K]
3 years ago
14

Help solve these using the addition and multiplication properties of equality

Mathematics
1 answer:
Leno4ka [110]3 years ago
7 0

#19


-4/5x=8


-4(x)/5=8


-4x/5=8


Multiply both sides by


-4x=8(5)


-4x=40


Divide both sides by -4


X= -10


#21

-4/3x+5=7


Multiply both sides by 3


-4/3x(3)+5(3)=7(3)


-4x+15=21


-4x=21-15


-4x=6


X=6/-4


X=-3/2





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