Question

9(a+2)=9
16=4(m+2)
-4(k-6)=-4
-18=9(d+1)
-7(h-4)=21

Answer 1

Explicación paso a paso:

$9(a + 2) = 9 \\ 9a + 18 = 9 \\ 9a = 9 - 18 \\ 9a = - 9 \\ a = - 9 \div 9 \\ a = - 1$

$16 = 4(m + 2) \\ 16 = 4m + 8 \\ 16 - 8 = 4m \\ 8 = 4m \\ 8 \div 4 = m \\ 2 = m$

$- 4(k - 6) = - 4 \\ - 4k + 24 = - 4 \\ - 4k = - 4 - 24 \\ - 4k = - 28 \\ k = - 28 \div - 4) \\ k = 7$

$- 18 = 9(d + 1) \\ - 18 = 9d + 9 \\ - 18 - 9 = 9d \\ - 27 = 9d \\ - 27 \div 9 = d \\ - 3 = d$

$- 7(h - 4) = 21 \\ - 7h + 28 = 21 \\ - 7h = 21 - 28 \\ - 7h = - 7 \\ h = - 7 \div ( - 7) \\ h = 1$