First equation3.4 + 2 = 5.y = (5.4 - 2.3y = 3.1
Second equation31 - 2x - 12 = 4x + 231 - 12 - 21 = 4x + 2-2x = -x = 2
Third equation4(5x + 2) = 10(2x - 320x + 8 = 20x - 3x = 19
Fourth equation2(7x - 7) = 7(2x - 3) + 14x - 14 = 14x - 21 + 14x - 14 = 14x - 1No solution as the variables cancel out.
First equation
3.4 + 2 = 5.
y = (5.4 - 2.3
y = 3.1
Second equation
31 - 2x - 12 = 4x + 2
31 - 12 - 21 = 4x + 2
-2x = -
x = 2
Third equation
4(5x + 2) = 10(2x - 3
20x + 8 = 20x - 3
x = 19
Fourth equation
2(7x - 7) = 7(2x - 3) +
14x - 14 = 14x - 21 +
14x - 14 = 14x - 1
No solution as the variables cancel out.