a + 6
If: 12 = x+6 Then: x = 6
The pile of leaves, an 'unknown,' would be the 'x' in 'x+6.'
-10+6=-4
x + 4 = 6 x = 6 - 4 x = 2
basic algebra -8x + 6 = -58 -8x = -64 x = (-64/-8) x = 8
yes
a+3
By studying a lot.
4x plus 7
2x - 6 = x + 5 add 6 and subtract x to both sides; x = 11
If you don't know what x is then there is nothing more you can do with that problem. At least in 9th grade algebra haha.
4x