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Aflati-l pe X din :
a) (132 x X - 1272) : 148 = 36
b) [(5 x X + 178 ) x 15 + 90] : 45 = 63
c) [720:(160 - 1400 : X) + 24] + 24 x 5 = 180

PS: Cel cu CAPS este X


Răspuns :

a)(132•x-1272):148=36; 132x-1272=5328; 132x=6600; x=50; b)[(5x+178)15+90]:45=63; (5x+178)15+90=2835; 15(5x+178)=2745; 5x+178=183; 5x=5; x=1; c)[720:(160-1400:x)+24]+24•5=180; 720:(160-1400:x)+24=60; 720:(160-1400:x)=36; 160-1400:x=20; 1400:x=140; x=10