Решите уравнения : 1) 2000 ÷ (2х+50)=2 2) 61-(3х+51)=1 3)(8х-12)×15-200÷4=10 4) (49х+11)×5-293=7 5) (5х+70)÷120+2=3

2000:(2х+50)=2 (2х+50)=2000:2 2х+50=1000 2х=1000-50 х=475 --------------------- 61-(3х+51)=1 3х+51=61-1 3х+51=60 3х=9 х=3 ----------------------- (8х-12)*15-200:4=10 (8х-12)*15=10+50 (8х-12)*15=60 8х-12=60:15 8х-12=4 8х=4+12 8х=16 х=2 -------------------- (49х+11)*5-293=7 (49х+11)*5=7+293 49х+11=300:5 49х+11=60 49х=60-11 49х=49 х=1 --------------------------------------- (5х+70):120+2=3 (5х+70):120=1 5х+70=1*120 5х+70=120 5х=120-70 5х=50 х=10