Question

8+5=15.;x-8=30;x+5=12;x+3=-7 x+1=1 ;3x-4=2​

Answer 1

Respuesta:

$8x + 5 = 15 \\ \\ 8x = 15 - 5 \\ \\ 8x = 10 \\ \\ x = \frac{10}{8} \\ \\ x = \frac{5}{4} \\ \\ comprobacion \\ \\ 8x + 5 = 15 \\ \\ 8( \frac{5}{4} ) + 5 = 15 \\ \\ 2(5) + 5 = 15 \\ \\ 10 + 5 = 15 \\ \\ 15 = 15$

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$x - 8 = 30 \\ \\ x = 30 + 8 \\ \\ x = 38 \\ \\ comprobacion \\ \\ x - 8 = 30 \\ \\ 38 - 8 = 30 \\ \\ 30 = 30$

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$x + 5 = 12 \\ \\ x = 12 - 5 \\ \\ x = 7 \\ \\ comprobacion \\ \\ x + 5 = 12 \\ \\ 7 + 5 = 12 \\ \\ 12 = 12$

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$x + 3 = - 7 \\ \\ x = - 7 - 3 \\ \\ x = - 10 \\ \\ comprobacion \\ \\ x + 3 = - 7 \\ \\ - 10 + 3 = - 7 \\ \\ - 7 = - 7$

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$x + 1 = 1 \\ \\ x = 1 - 1 \\ \\ x = 0 \\ \\ comprobacion \\ \\ x + 1 = 1 \\ \\ 0 + 1 = 1 \\ \\ 1 = 1$

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$3x - 4 = 2 \\ \\ 3x = 2 + 4 \\ \\ 3x = 6 \\ \\ x = \frac{6}{3} \\ \\ x = 2 \\ \\ comprobacion \\ \\ 3x - 4 = 2 \\ \\ 3(2) - 4 = 2 \\ \\ 6 - 4 = 2 \\ \\ 2 = 2$