If it's not what You are looking for type in the equation solver your own equation and let us solve it.
42+65+x=90
We move all terms to the left:
42+65+x-(90)=0
We add all the numbers together, and all the variables
x+17=0
We move all terms containing x to the left, all other terms to the right
x=-17
| 44+59+x=180 | | 7.9-4v=1.5 | | y-1.37=9.23 | | y+2.52=5.38 | | y-2.96=7.28 | | 9x+12+9x+4=180 | | -2/5b+1=-11 | | 2(1-x^2)+3x=0 | | 20x/22=4672 | | 20-4x=2x-28 | | x*0.75=3125 | | e^2+9=135 | | x^2(x^2-31)=180 | | 11x+25=20 | | 12x^2-11=-9x | | x=50-60/70 | | -2x-18=9 | | 3t-5=6t-1 | | 9(2x-3)=21x+4+6x | | 1=2/3(10x+15) | | 5^(x-1)=17 | | 5^x-1=17 | | 4x+7=3-+14 | | 3^4t=16 | | 5p(-6)=60 | | -13x+7-3x=3x-73-3x | | 2(1-x^2)+x=0 | | 4x-71=69 | | (9x-7)+((7x-3)=180 | | 4z-28=116 | | 9=0.4m+3 | | 6y-129=105 |