Question

Afla numărul necunoscut: 123×42+a=6349; b+30×40=8000; 125×7-x=520; y-401×9=18; 15×105+m=20×300; n-508×9=45
Va rog frumos ajutați-mă

Answer 1

123x42+a=6349
5166+a=6349
a=6349-5166
a=1183

b+30x40=8000
b+1200=8000
b=8000-1200
b=6800

125x7-x=520
875-x=520
x=875-520
x=355

y-401x9=18
y-3609=18
y=3609+18
y=3627

15x105+m=20x300
1575+m=6000
m=6000-1575
m=4425

n-508x9=45
n-4572=45
n=45+4572
n=4617

Answer 2

123×42+a=6349;
5166+a= 6349
a=6349-5166
a=1183

b+30×40=8000
b+1200=8000
b=8000-1200
b=6800


125×7-x=520
875-x=520
875-500=x
x=375


y-401×9=18;
y-3609=18
y=3609+18
y=3627


15×105+m=20×300
1575+m=6000
m=6000-1575
m=4425


n-508×9=45
n- 4572=45
n=4572+45
n=4617