Answer:
x = 52
Step-by-step explanation:
Formula
[tex]\dfrac{\text{12+17+19+x}}{4} = \text{25}[/tex]
Combine the left
[tex]\dfrac{\text{48+x}}{4} = \text{25}[/tex]
Multiply both sides by 4
4*(48 + x)/4 = 25 * 4
48 + x = 100 Subtract 48 from both sides
48 - 48 +x = 100 - 48 Combine
x = 52
