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Simplifying 2.1 = 7 Solving 2.1 = 7 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
| 2cos^2x+1=cosx | | 2x^2+40x+168=0 | | 2+4(3+x)=18 | | C=15n+50 | | 7n+5-2n=20+3n+1 | | 0.60x+1.50+10=13.50 | | 10x+20y+30z=10460 | | 3(-0.4u+1.8)= | | 2/3(x-15)=26 | | 2/3(x-15)=14 | | 1/2(x-0.3)=1.55 | | 7a+2b=5000 | | 2(x+5)-3=7 | | 6e^5x-3=18 | | 1p+.80=2p+.65 | | 3x^2-16=20 | | 2.8(-1+2n)= | | 14c+2=20c+1.50 | | 14c+2=20+1.5 | | 10(-x+4)=12 | | 3x^3+27x=30 | | x^5+10x^3+20x-4=0 | | 22f+80=30f | | 2.3-0.1x=0 | | 9/4x-1/2=1/5 | | 4+v+5v-10= | | 12n=13n+14 | | 4y(y-1)=-19 | | 7(s+906)=777 | | 7(2-906)=777 | | 22-4w=10 | | 22-4=10 |