Respuesta:
[tex]213) \: 2(x + 4) = 28 \\ \: 2x + 8 = 28 \\ \: 2x = 28 - 8 \\ 2x = 20 \\ x = 10[/tex]
[tex]215) \: 5x - 6 = 9 \\ \: \: 5x = 9 + 6 \\ \: 5x = 15 \\ x = 3[/tex]
[tex]217) \: 18 - 6 = 4x \\ \: 12 = 4x \\ \: 3 = x[/tex]
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Verified answer
Respuesta:
[tex]213) \: 2(x + 4) = 28 \\ \: 2x + 8 = 28 \\ \: 2x = 28 - 8 \\ 2x = 20 \\ x = 10[/tex]
[tex]215) \: 5x - 6 = 9 \\ \: \: 5x = 9 + 6 \\ \: 5x = 15 \\ x = 3[/tex]
[tex]217) \: 18 - 6 = 4x \\ \: 12 = 4x \\ \: 3 = x[/tex]