Question

CALCULE: 49 (elevado a x) - 42 = 7 (elevado a x)

Answer 1

${49}^{x} - 42 = {7}^{x}$
${49}^{x} - {7}^{x} = 42$
${42}^{ x} = 42$
${42}^{x} = {42}^{1}$
x = 1