Question

8(6a-9)=72
5(3×+7)=155
2(7×-6)=114
7(3×+8)=182
4(6a-9)=324

Answer 1

Explicación paso a paso:

$8(6a - 9) = 72 \\ 48a - 72 = 72 \\ 48a = 72 + 72 \\ 48a = 144 \\ a = \frac{144}{48} \\ a = 3$

$5(3x + 7) = 155 \\ 15x + 35 = 155 \\ 15x = 155 - 35 \\ 15x = 120 \\ x = \frac{120}{15} \\ x = 8$

$2(7x - 6) = 114 \\ 14x - 12 = 144 \\ 14x = 114 + 12 \\ 14x = 126 \\ x = \frac{126}{14} \\ x = 9$

$7(3x+8) = 182 \\ 21x + 56 = 182 \\ 21x = 182 - 56 \\ 21x = 126 \\ x = \frac{126}{21} \\ x = 6$

$4(6a - 9) = 324 \\ 24a - 36 = 324 \\ 24a = 324 + 36 \\ 24a = 360 \\ a = \frac{360}{24} \\ a = 15$