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a in (-oo:+oo)
(2*a)/7+(5*a)/7 = 0
a = 0
a = 0
| -4x^2-25x+56=0 | | 5(4x+p)=e | | Logx+log(-4x-23)=log(15) | | 6.3/11.4=x/6.4 | | 5/12=x/10 | | x^2-78x-116=0 | | 6.7/11.6=8.3/x | | 380/425=500/x | | 76/85=500/x | | 44=B-10 | | 19/25=500/x | | 8E=(-80) | | G/4=16 | | -14=(-2F) | | 5x/4*2/3x= | | 10+C=(-17) | | 2(6m+3n)= | | 7x-2y+137-9x= | | d-(-33)=28 | | 7x+18=5x-12 | | -12(2-v)+3=-8v+19 | | 5(3s+r)= | | -15+0.39=50 | | 4(3a-3)= | | 3=(x*1.10)+((x+.52)*1.25) | | 11k+(-13k)-(-k)-1=5 | | 9x+4y=5000 | | 15m-4m+m-m-1=15 | | m^2-6m-40=0 | | (-11p)-(-4p)+4p=(-15) | | 7(r-825)=476 | | 12r-4r-6r-r+2=9 |