If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4.2+x+-1.4=7.5
We move all terms to the left:
4.2+x+-1.4-(7.5)=0
We add all the numbers together, and all the variables
x-4.7=0
We move all terms containing x to the left, all other terms to the right
x=4.7
| 9-4x=7x-6 | | (4+z-(3+2z))/6=(-z-3(5-2))/7 | | 5x+4/3+8-x/2=10 | | 9x/2+x=4400 | | 11x+6=7x+10 | | 7(5x+9)=42 | | 8x+207=6x+85 | | 200=160+2*5h | | (7x+9)^4-(7x+9)^3=0 | | 2(3x+4)-2x=-12 | | -6u+6+7u=6+10u-6 | | 0.7x-0.1(3-x)=4.1 | | 3^x-5=9 | | 3s+24=4s+17 | | 80×x=45 | | 2x^2-18x+39=0 | | 20=-4(3a-2 | | 8g-13=2g+1 | | x-9/2x=12 | | 3s+15=4s+8 | | x+3x/25=4000 | | 30r=4.5 | | 4.5r=30 | | x+.12x=4000 | | 100x–5x^2=30x^2 | | 100x-5x^2=30x^2 | | |9y-8|=|8-9y| | | 431.2+826.4x=2910.4 | | x*(4^10)=4000 | | x^2+21x-73.5=0 | | 81-27y-36y=18 | | 3/5d+8=3 |