How do you solve #9a + 15 =10a - 7#?
1 Answer
May 31, 2016
Explanation:
Given,
#9a+15=10a-7#
Subtract
#9acolor(white)(i)color(red)(-9a)+15=10acolor(white)(i)color(red)(-9a)-7#
#15=a-7#
Add
#15color(white)(i)color(red)(+7)=a-7color(white)(i)color(red)(+7)#
#a=color(green)(|bar(ul(color(white)(a/a)color(black)(22)color(white)(a/a)|)))#