Question

Aflati x din ecuatiile:
a)x+2/5=3/2
b)x-3/4=2/3
c)7/8=x-3/2
d)10/3-x=1/9
e)2/7·x=3/2
f)x·5/7=1/2
g)x:3/7=1/6
h)6/11:x=3/22
i)4/11=x:11/3

Answer 1

a) x=3/2-2/5, x=15-4 tot supra 10, x=11/10.
b) x=2/3+3/4, x=8+9 tot supra 12, x=17/12.
c) 7=8(x-3/2), 7=8x-12, -8x=-12-7, -8x=-19, x=19/8.
d)  -x=1/9-10/3, -x=1-30 tot supra 9, -x=-29/9, x=29/9.
e) 7/2×2/7x=7/2×3/2, x=21/4.
f) 5/7x=1/2, 7/5×5/7x=7/5×1/2, x=7/10.
g) x×7/3=1/6, 7/3x=1/6, 3/7×7/3x=3/7×1/6, x=1/7×1/2, x=1/14.
h) 6/11x=3/22,  x≠0, 132=33x, 33x=132, x=4, x≠0, x=4.
i) 4/11=x×3/11, 4/11=3/11x, 11/3×4/11=11/3×3/11x, 1/3×4=x, 4/3=x, 4=3x, 3x=4, x=4/3..........sp.aj.