Răspuns :
a. 2,5x + 2,25=14,75 /-2,25
2,5x= 12,5 / ÷2,5
x=5
b. 0,75(x+0,5) = 4,875
0,75x + 0,375= 4,875
75/100x + 375/1000 = 4875/1000
750/1000x + 375/1000 = 4875/1000 /÷1000
750x + 375 = 4875 / -375
750x = 4500 / ÷ 750
×=6
2,5x= 12,5 / ÷2,5
x=5
b. 0,75(x+0,5) = 4,875
0,75x + 0,375= 4,875
75/100x + 375/1000 = 4875/1000
750/1000x + 375/1000 = 4875/1000 /÷1000
750x + 375 = 4875 / -375
750x = 4500 / ÷ 750
×=6