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scZoUnD [109]
3 years ago
9

- 4 x + 9 = 21 x=___ help

Mathematics
2 answers:
faust18 [17]3 years ago
4 0
X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
Leto [7]3 years ago
3 0

Answer:

- 4x + 9 = 21 \\  - 4x = 21 - 9 \\  = 12 \\ x =  \frac{12}{ - 4}  \\ x =  - 3

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