Answer:
a) x = -10. b) x = 7
Explanation:
a)
2(x + 3) = x -4
multiply out the bracket:
2(x + 3) = 2x + 6.
now we have 2x + 6 = x - 4.
subtract x from both sides:
2x - x + 6 = -4
x + 6 = -4
subtract 6 from both sides:
x = -10.
b)
4(5x - 2) = 2(9x + 3)
multiply out both brackets:
20x - 8 = 18x + 6
subtract 18x from both sides:
20x - 18x - 8 = 6
2x - 8 = 6
add 8 to both sides:
2x = 14
x = 7