Question

rezovati ecuatiile si inecuatiile:
a) 2(x+3)<307-251

b) 2la puterea x+1mai mic sau egal decat 16

c) 2ori{12+3ori[60-3ori(27-4ori3)]}-5x=7

Answer 1

a) 2x+6<56
2x<
2x<50
x<50/2
x<25
c) 2*[12+3*(60-81+36)]-5x=7
2*(12+45)-5x=7
24+90-5x=7
-5x=7-90-24
x=107/5
x=21,4