x+y+z=74
2.5x+1.95y+1.5z=144.9
x-z=-2
72÷(-3)÷(-2)+352÷(2-13)
398.97 * 55.423
x^2 /4
nig + ger
nigger+nigger=
2=x+(2-x)
9x-40=4x+5
make x the subject of x-7=v
3x-1=4-2x
