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x-8.4=0
We move all terms containing x to the left, all other terms to the right
x=8.4
| 90÷n=15 | | 3x+4=7×2 | | −5⋅(5−2y)=3y+387 | | 20x-2=18x+4 | | X(x)-13x=90 | | X(x)-13x-90=0 | | X(x)-15x+2x+30=120 | | n×9÷3+25=40 | | 45+5m=3 | | (x+x+10)*0,5=9 | | X/14-2x=5x | | 3x+45=27,x+3 | | Y/5y-2=23 | | Y/5y-2=22 | | x*x=20+x | | x/x=20+x | | 3x*x-21x+36=0 | | x*x-12x-64=0 | | x*x+18x-63=0 | | x*x+11x-60=0 | | 6+|2x+4|=14 | | 5×n=100 | | 5y-5=360 | | 11x+1=360 | | X2+17x+132=0 | | 7y-4=360 | | 7y-4=350 | | (28÷4)+3+(10-8)x5=0 | | 8.9(x–3.5)+4.2(3x+2.3)=4.7x | | 3x+2x²-324=0 | | -2y+14.9=2.1 | | 2/3(a+2)=18 |