First equation:3.4 + 2 = 5.4y = (5.4 - 2.3)y = 3.1
Second equation:31 - 2x - 12 = 4x + 2131 - 12 - 21 = 4x + 2x-2x = -4x = 2
Third equation:4(5x + 2) = 10(2x - 3)20x + 8 = 20x - 30x = 19
Fourth equation:2(7x - 7) = 7(2x - 3) + 714x - 14 = 14x - 21 + 714x - 14 = 14x - 14No solution as the variables cancel out.
First equation:
3.4 + 2 = 5.4
y = (5.4 - 2.3)
y = 3.1
Second equation:
31 - 2x - 12 = 4x + 21
31 - 12 - 21 = 4x + 2x
-2x = -4
x = 2
Third equation:
4(5x + 2) = 10(2x - 3)
20x + 8 = 20x - 30
x = 19
Fourth equation:
2(7x - 7) = 7(2x - 3) + 7
14x - 14 = 14x - 21 + 7
14x - 14 = 14x - 14
No solution as the variables cancel out.