Question

mostrar como foi feito o cálculo ​

Answer 1

7/2 ou 3,5

$7x - 3 = 4 + 5x \\ 7x - 5x = 4 + 3 \\ 2x = 7x \\ x = \frac{7}{2} \: ou \: 3.5$

Answer 2

$\LARGE\tt{}7x - 3 = 4 + 5x \\ \LARGE\tt{}7x - 3 - 5x = 4 \\ \LARGE\tt{}7x - 5x = 4 + 3 \\ \LARGE\tt{}2x = 4 + 3 \\ \LARGE\tt{}2x = 7 \\ \\ \LARGE\tt{}x = \dfrac{7}{2} \\ \\\LARGE\tt{}s \{x = \frac{7}{2} \}$

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