Respuesta :

smithkekoal970

Answer:

x = -7.714

Step-by-step explanation:

-5 × 7^x + 4 = -31

7^x + 4 = -31 + 5

7^x + 4 = -26

7^x+4 ÷ 7 = -26 ÷ 7

x+ 4 = -3.7142857143

x + 4 - 4 = - 3.7142857143 - 4

x = -7.714

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