Subtract by 7x and divide by 2.
7x = 3x - 12 4x=-12 x=-3
4xy+1=3y-7x 4xy-3y=-7x-1 y(4x-3)=-7x-1 y=(-7x-1)/(4x-3)
Solve for y 3y=-7x+9 y=-7/3x+3 the slope is the coefficient of x in this case, it is -7/3
The question contains an expression but not an equation or inequality. There is, therefore, nothing to solve!
7x-3=39 7x=42 x=6
Subtract by 7x and divide by 2.
4x+9 = 7x+3 4x-7x = 3-9 -3x = -6 x = 2
7x = 3x - 12 4x=-12 x=-3
Add 3 to 46 then divide by 7.
4xy+1=3y-7x 4xy-3y=-7x-1 y(4x-3)=-7x-1 y=(-7x-1)/(4x-3)
7x + 8 = 11x + 3, solve for xsubtract 7x from both sides8 = 11x - 7x + 38 = 5x + 3subtract 3 from both sides5 = 5xdivide both sides by 51 = x.
2x+3=9x 3=9x-2x 3=7x x=3/7
-7x + 6 + 7x - 2 = 4
7x+6 = -3x-24 7x+3x = -24-6 10x = -30 x = -3
Solve the brackets, starting from the innermost and working outwards: 2(7x+y(-3(5x-2y))) multiply by -3: 2(7x+y(-15x+6y)) multiply by y: 2(7x - 15xy+6y2) multiply by 2: 14x - 30xy + 12y2 I suspect, though, that there is something missing before the -3.
-21-4x=9-7x 7x-4x=9+21 3x=30 x=30 / 3 therefore x=10