If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7a/5+42/5=0
We multiply all the terms by the denominator
7a+42=0
We move all terms containing a to the left, all other terms to the right
7a=-42
a=-42/7
a=-6
| 3x-8=64-9 | | 1/8-4b=9 | | 8-4b=9 | | 10-4b=9 | | 0.3x=200 | | 1.4a=-8.4 | | 2(5x-3)+4x+3(2x-7)=5(3x+1)+8 | | 2x-70=2x-91 | | 70-20x=30 | | 2z^2-7z=-6 | | (2y÷7)-4=16 | | 8x−5x+4−x=1x+B | | 6x=3+4x | | 10+x/2=3x | | 3x-4(-8)+7=0 | | 6y+9-4y+7=0 | | 2x+6x+(x^2)=36 | | 4.9t^2-19.6t+98=0 | | x^2-40x+780=0 | | 0.015x-0.01=0.025x+0.2 | | 27x+7=88 | | 6x+2x-4=0 | | 4x(2-2x)=17 | | 94x+59=0 | | 8y-6y+4y=24 | | y^2+(1/y)=333+(1/333) | | 2y2+9y+4=0 | | 5/7x=42 | | 5(x+6)-2x=3x+10 | | 3^x=4x+3 | | (x+26)=2(x+2) | | 3(10t)/5t=6 |