Question

ayuda con prueba porfavor
3-2x(5-2x)=4x+x-30
3[2x-(3x+1)]=x+1
3x-7=2(x+1)
(X-15)=3(X-19)
3(X+4)=4X-1
2(3-4X)=2X-9
2(X+2)=4[2X-5(X-2)]

Answer 1

3 - 2x(5-2x) = 4x + x - 30
3 - 10x + 4x = 4x + x - 30
-10x + 4x - 4x - x = -30 - 3
-11x = -33
$x= \frac{-33}{-11} \\\\x=3$

****************************************************************
3[2x - (3x + 1)] = x + 1
3[2x - 3x - 1] = x + 1
3[-x -1] = x + 1
-3x - 3 = x + 1
-3x - x = 1 + 3
-4x = 4
$x = \frac{4}{-4} \\\\x=-1$

*****************************************************************
3x - 7 = 2(x + 1)
3x - 7 = 2x + 2
3x - 2x = 2 + 7
x = 9

*****************************************************************
(x - 15) = 3(x - 19)
x - 15 = 3x - 57
x - 3x = -57 + 15
-2x = -42
$x= \frac{-42}{-2} \\\\x=21$

*****************************************************************
3(x + 4) = 4x - 1
3x + 12 = 4x - 1
3x - 4x = -1 - 12
-x = -13  (*-1)
x = 13

******************************************************************
2(3 - 4x) = 2x - 9
6 - 8x = 2x - 9
-8x - 2x = -9 - 6
-10x = -15
$x= \frac{-15}{-10} \\\\x= \frac{3}{2}$

*******************************************************************
2(x + 2) = 4[2x - 5(x - 2)]
2x + 4 = 4[2x - 5x + 10]
2x + 4 = 4[-3x + 10]
2x + 4 = -12x + 40
2x + 12x = 40 - 4
14x = 36
$x= \frac{36}{14} \\\\x= \frac{18}{7}$