Answer:
![x=-7](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qp7m9sktqywwjsmtkve39iyj6rs8mn21w9.png)
Explanation:
First you need to apply Distributive property on the left side of the equation:
![5(x+1)+51=-3x \\5x+5+51=-3x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6orga8942k3ol98pwa4v7o5wq3pzeaf0xj.png)
Now, you need to add the like terms:
![5x+56=-3x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/8nh3bcwlybe7ohwvk87lhlbwdgkz056jcc.png)
By the Subtraction property of equality, you can subtract 5x to both sides of the equation:
![5x+56-5x=-3x-5x\\56=-8x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wjb1ubygi2mnhzv6ynr561dp8bh7t0pyoj.png)
By the Division property of equality, you can divide by -8 both sides of the equation. Then you get:
![(56)/(-8)=(-8x)/(-8)\\\\-7=x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/7kdk4qow6cyltab3l2sep8jdka4mvrnyp5.png)