a) x- 3x- 5x- 7x= 2³ - 54
(1-3-5-7).x=8 - 54
-14.x= - 46
x= -46: -14
x= 23/7
x-3x-5x-7x=2^3 -54
=> -14x=8-54
=> -14x=-46
=> x=23/7
a) x - 3x - 5x - 7x = 23 - 54
x.( 1 - 3 - 5 - 7) = 8 - 54
x. (-14) = -46
x = -46 : (-14)
x = \(\dfrac{23}{7}\)