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=90Y-180
We move all terms to the left:
-(90Y-180)=0
We get rid of parentheses
-90Y+180=0
We move all terms containing Y to the left, all other terms to the right
-90Y=-180
Y=-180/-90
Y=+2
| 7x+6×-9=30 | | r+25=30 | | v-8=v-3 | | 15.1j=15.3j+3 | | 2x^2=-118 | | 19.00+4.50x=11.00+5.75x | | 4.32-13.3u+6.61=-15.1u+0.31 | | n+22.7=46 | | 4b-8b=-8-5b | | 15.1j=15 | | 9.46=15.4+u | | 2+7=14+x | | 21-x=-33 | | 938=78p | | 15-2n-5n=-7n+5n | | (5(4z/3)=11) | | 8y=2Y7,-12 | | 11/13=x/8 | | 3(x-5)+8=4(x-1) | | 6x-51=9x=32 | | 12n+19=11n+7 | | 3z-8=19 | | 3m+m=32 | | X+y=242 | | 88=10x-2 | | 19a=-266 | | 3z-8=18 | | 25=y+18 | | 7x+4x-55=77 | | 5x+38=10x+3 | | 3(n+5)-1/2(n-2)=12 | | 7x+73=180 |