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15=12y-213
We move all terms to the left:
15-(12y-213)=0
We get rid of parentheses
-12y+213+15=0
We add all the numbers together, and all the variables
-12y+228=0
We move all terms containing y to the left, all other terms to the right
-12y=-228
y=-228/-12
y=+19
| 9+8n=145 | | 5x+8+2x-3=19 | | c+0.18c=236 | | ((13x-35)+(5x-19)=(2x+14)) | | 21/14=3/n | | 2/3x+1/4=5/3 | | 8d-3d=625 |