If it's not what You are looking for type in the equation solver your own equation and let us solve it.
10=-0.4a
We move all terms to the left:
10-(-0.4a)=0
We get rid of parentheses
0.4a+10=0
We move all terms containing a to the left, all other terms to the right
0.4a=-10
a=-10/0.4
a=-25
| 5x-2x+5=x-4+9 | | 7x=4(5x+6) | | 7x-4x+6=x-2+8 | | x+.12x=3000 | | 6x=2×+16 | | y–6=14 | | 3x-5=-8x+6 | | 7.5x-2.5x+8=-7 | | 10^3x=1/100 | | 910x=0.18 | | 4(x+3)+2=4x+5 | | 4m+7m-2=108 | | 47x=94 | | -1(x-6)=3(x-5) | | $9x^2=36$ | | 5x+15=13x-52 | | u-(-4)=10 | | 7x+2=5x+30 | | 3/y=7/60 | | 16y=64-48, | | X²+9x-15=0 | | y+(-7)=4 | | 2x+7x=89 | | 10x^2-3=x | | u-10=2 | | 6.8-1.7x=3-1.5x | | -10r=-36 | | 2y-8=48 | | 3(x-3)=5(x-2)-x | | 10(x+2)=5x | | 3a/2+5=1 | | −2u+11=17 |