![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The original weight plus the additional gain is 160. \ \
\![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=28552cc595cb4bf34f144d1c3eb914b0.png\")
\
The equation represents the situation is 155 + g = 160 \ \
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
According to Subtraction property of equality: if a = b, then a ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c7a8c800d2df7d176b09fff75181eb8f.png\")
c = b ![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c7a8c800d2df7d176b09fff75181eb8f.png\")
c.
155 + g155= 160155 (Subtract 155 from each side).
g= 160155 (Additive inverse property:155 155= 0)
g = 5 (Subtract: 160155 = 5)
![\"\"](\"/userfiles/image/steps_images/step3.JPG\")
Check:
\To check the solution, substitute g = 5 in original equation.
\155 + 5 = 160
\160 = 160 (Add: 155 + 5 = 160)
\Compare the values, the equation is true. The solution is g = 5.
\![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Darius needs to gain 5 pounds.
\