Question

12 q) 9x + 42 = 3x - 18
r) (3x + 12). 5 = 90
t) 255 = 3 . (1 + 2x)
u) 427 = 15 + 4x
– 45 = 27
x) 4+ (50 -x):11 = 8


z) 95 : (100 – (3x + 6)] = 5
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Answer 1

Răspuns:

q ) 9x+42=3x-18=9x+3x=42-18=12x=24 x=24÷12 x=2

Answer 2

r) 15x+60=90 15x=90-60=30 x=30:15=2
t) 255=3+6x 6x=255-3=252. X=252:6=42