Respuesta :

reinhard10158

Step-by-step explanation:

just put 4 in for x and see, if it works out.

7 - 4 = 12×4

3 = 48

no

4² + 3 = 10×4 - 21

16 + 3 = 40 - 21

19 = 19

yes

5 + 2×4 = 3×4 + 3

5 + 8 = 12 + 3

13 = 15

no

79 - 3×4 = 12×4 + 19

79 - 12 = 48 + 19

67 = 67

yes

redsonja762

Answer:

2 and 4

Step-by-step explanation:

took test

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