Without an equality sign and not knowing the plus or minus values of some of the given terms the given expression can't be considered to be an equation.
To do this equation, you collect like terms. 7x-4x+x-15 is your original equation, you have 3 terms with "'x'" in them, and they are 7x, -4x, and x. 7x + (-4x) +x simplifies to 4x, because 7-4 = 3 + 1 = 4 (the x is really 1x....). After this, you get 4x-15, which is as simplified as this equation can be.
-1 + 4x + 6x - 20 =10x - 19
It is 6x+1 simplified
if 4x+1=12 4x+1-1=12-1 4x=11 4x/4=11/4 x=11/4
Without an equality sign the given terms can't be considered to be an equation and so therefore no solution is possible.
-4x + 4y = 1
That is a simplified expression, so it can't be solved nor can it be simplified further, so it remains as 4x + 1
To do this equation, you collect like terms. 7x-4x+x-15 is your original equation, you have 3 terms with "'x'" in them, and they are 7x, -4x, and x. 7x + (-4x) +x simplifies to 4x, because 7-4 = 3 + 1 = 4 (the x is really 1x....). After this, you get 4x-15, which is as simplified as this equation can be.
-1 + 4x + 6x - 20 =10x - 19
It is 6x+1 simplified
Assuming there are no parentheses:2 times X - 1 + 4X - 6 + 2X =2X - 1 + 4X - 6 + 2X =2X + 4X + 2X - 1 - 6 =8X - 1 - 6 =8X - 7
It is an expression that can be simplified to: 6x+1
if 4x+1=12 4x+1-1=12-1 4x=11 4x/4=11/4 x=11/4
An equation where x = 3
None because without an equality sign it is not an equation but the given expression of 4x-22(2x-1) can be simplified to: 22-40x
None because without an equality sign it is not an equation but the given expression of 4x-22(2x-1) can be simplified to: 22-40x
8x2 + 2x - 1 = 8x2 + 4x - 2x - 1 = 4x(2x + 1) - 1(2x + 1) = (4x - 1)(2x + 1)